Index: lib/Target/X86/X86InstrFPStack.td
===================================================================
--- lib/Target/X86/X86InstrFPStack.td
+++ lib/Target/X86/X86InstrFPStack.td
@@ -564,10 +564,13 @@
                 [(set RFP80:$dst, fpimm1)]>;
 }
 
-let SchedRW = [WriteZero] in {
+let SchedRW = [WriteFLD0] in {
 def LD_F0 : FPI<0xD9, MRM_EE, (outs), (ins), "fldz">;
+} // SchedRW
+
+let SchedRW = [WriteFLD1] in {
 def LD_F1 : FPI<0xD9, MRM_E8, (outs), (ins), "fld1">;
-}
+} // SchedRW
 
 // Floating point compares.
 let SchedRW = [WriteFCom] in {
Index: lib/Target/X86/X86SchedBroadwell.td
===================================================================
--- lib/Target/X86/X86SchedBroadwell.td
+++ lib/Target/X86/X86SchedBroadwell.td
@@ -166,6 +166,8 @@
 defm : BWWriteResPair<WriteJump,  [BWPort06],   1>;
 
 // Floating point. This covers both scalar and vector operations.
+defm : X86WriteRes<WriteFLD0,          [BWPort01], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,          [BWPort01], 1, [2], 2>;
 defm : X86WriteRes<WriteFLoad,         [BWPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [BWPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [BWPort23], 6, [1], 1>;
Index: lib/Target/X86/X86SchedHaswell.td
===================================================================
--- lib/Target/X86/X86SchedHaswell.td
+++ lib/Target/X86/X86SchedHaswell.td
@@ -156,6 +156,8 @@
 defm : HWWriteResPair<WriteIDiv64, [HWPort0, HWDivider], 25, [1,10], 1, 4>;
 
 // Scalar and vector floating point.
+defm : X86WriteRes<WriteFLD0,          [HWPort01], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,          [HWPort01], 1, [2], 2>;
 defm : X86WriteRes<WriteFLoad,         [HWPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [HWPort23], 6, [1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [HWPort23], 7, [1], 1>;
@@ -657,9 +659,6 @@
 // r.
 def : InstRW<[HWWriteP01], (instregex "ST_(F|FP)rr")>;
 
-// FLDZ.
-def : InstRW<[HWWriteP01], (instregex "LD_F0")>;
-
 // FLDPI FLDL2E etc.
 def : InstRW<[HWWrite2P01], (instregex "FLDPI", "FLDL2(T|E)", "FLDL(G|N)2")>;
 
Index: lib/Target/X86/X86SchedSandyBridge.td
===================================================================
--- lib/Target/X86/X86SchedSandyBridge.td
+++ lib/Target/X86/X86SchedSandyBridge.td
@@ -148,6 +148,8 @@
 defm : SBWriteResPair<WriteBZHI, [SBPort1], 1>;
 
 // Scalar and vector floating point.
+defm : X86WriteRes<WriteFLD0,          [SBPort5], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,          [SBPort0,SBPort5], 1, [1,1], 2>;
 defm : X86WriteRes<WriteFLoad,         [SBPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [SBPort23], 6, [1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [SBPort23], 7, [1], 1>;
Index: lib/Target/X86/X86SchedSkylakeClient.td
===================================================================
--- lib/Target/X86/X86SchedSkylakeClient.td
+++ lib/Target/X86/X86SchedSkylakeClient.td
@@ -161,6 +161,8 @@
 defm : SKLWriteResPair<WriteJump,  [SKLPort06],   1>;
 
 // Floating point. This covers both scalar and vector operations.
+defm : X86WriteRes<WriteFLD0,          [SKLPort05], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,          [SKLPort05], 1, [2], 2>;
 defm : X86WriteRes<WriteFLoad,         [SKLPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [SKLPort23], 6, [1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [SKLPort23], 7, [1], 1>;
Index: lib/Target/X86/X86SchedSkylakeServer.td
===================================================================
--- lib/Target/X86/X86SchedSkylakeServer.td
+++ lib/Target/X86/X86SchedSkylakeServer.td
@@ -161,6 +161,8 @@
 defm : SKXWriteResPair<WriteJump,  [SKXPort06],   1>;
 
 // Floating point. This covers both scalar and vector operations.
+defm : X86WriteRes<WriteFLD0,          [SKXPort05], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,          [SKXPort05], 1, [2], 2>;
 defm : X86WriteRes<WriteFLoad,         [SKXPort23], 5, [1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [SKXPort23], 6, [1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [SKXPort23], 7, [1], 1>;
Index: lib/Target/X86/X86Schedule.td
===================================================================
--- lib/Target/X86/X86Schedule.td
+++ lib/Target/X86/X86Schedule.td
@@ -142,6 +142,8 @@
 
 // Floating point. This covers both scalar and vector operations.
 def  WriteFLoad         : SchedWrite;
+def  WriteFLD0          : SchedWrite;
+def  WriteFLD1          : SchedWrite;
 def  WriteFLoadX        : SchedWrite;
 def  WriteFLoadY        : SchedWrite;
 def  WriteFMaskedLoad   : SchedWrite;
Index: lib/Target/X86/X86ScheduleAtom.td
===================================================================
--- lib/Target/X86/X86ScheduleAtom.td
+++ lib/Target/X86/X86ScheduleAtom.td
@@ -184,6 +184,8 @@
 // Floating point. This covers both scalar and vector operations.
 ////////////////////////////////////////////////////////////////////////////////
 
+defm : X86WriteRes<WriteFLD0,       [AtomPort01], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,       [AtomPort01], 6, [6], 1>;
 def  : WriteRes<WriteFLoad,         [AtomPort0]>;
 def  : WriteRes<WriteFLoadX,        [AtomPort0]>;
 def  : WriteRes<WriteFLoadY,        [AtomPort0]>;
@@ -202,7 +204,7 @@
 def  : WriteRes<WriteFMove,         [AtomPort01]>;
 def  : WriteRes<WriteFMoveX,        [AtomPort01]>;
 def  : WriteRes<WriteFMoveY,        [AtomPort01]>;
-                                    
+
 defm : X86WriteRes<WriteEMMS,       [AtomPort01], 5, [5], 1>;
 
 defm : AtomWriteResPair<WriteFAdd,           [AtomPort0],  [AtomPort0],  5,  5,  [5],  [5]>;
@@ -492,7 +494,7 @@
   let Latency = 1;
   let ResourceCycles = [1];
 }
-def : InstRW<[AtomWrite01_1], (instrs FDECSTP, FFREE, FFREEP, FINCSTP, LD_F0, WAIT,
+def : InstRW<[AtomWrite01_1], (instrs FDECSTP, FFREE, FFREEP, FINCSTP, WAIT,
                                       LFENCE,
                                       STOSB, STOSL, STOSQ, STOSW,
                                       MOVSSrr, MOVSSrr_REV,
@@ -560,7 +562,7 @@
   let Latency = 6;
   let ResourceCycles = [6];
 }
-def : InstRW<[AtomWrite01_6], (instrs LD_F1, CMPXCHG8rm, INTO, XLAT,
+def : InstRW<[AtomWrite01_6], (instrs CMPXCHG8rm, INTO, XLAT,
                                       SHLD16rrCL, SHRD16rrCL,
                                       SHLD16rri8, SHRD16rri8,
                                       SHLD16mrCL, SHRD16mrCL,
Index: lib/Target/X86/X86ScheduleBtVer2.td
===================================================================
--- lib/Target/X86/X86ScheduleBtVer2.td
+++ lib/Target/X86/X86ScheduleBtVer2.td
@@ -271,6 +271,8 @@
 // Floating point. This covers both scalar and vector operations.
 ////////////////////////////////////////////////////////////////////////////////
 
+defm : X86WriteRes<WriteFLD0,          [JFPU1, JSTC], 3, [1,1], 1>;
+defm : X86WriteRes<WriteFLD1,          [JFPU1, JSTC], 3, [1,1], 1>;
 defm : X86WriteRes<WriteFLoad,         [JLAGU, JFPU01, JFPX], 5, [1, 1, 1], 1>;
 defm : X86WriteRes<WriteFLoadX,        [JLAGU, JFPU01, JFPX], 5, [1, 1, 1], 1>;
 defm : X86WriteRes<WriteFLoadY,        [JLAGU, JFPU01, JFPX], 5, [1, 1, 1], 1>;
Index: lib/Target/X86/X86ScheduleSLM.td
===================================================================
--- lib/Target/X86/X86ScheduleSLM.td
+++ lib/Target/X86/X86ScheduleSLM.td
@@ -136,6 +136,8 @@
 defm : SLMWriteResPair<WriteIDiv64, [SLM_IEC_RSV01, SLMDivider], 25, [1,25], 1, 4>;
 
 // Scalar and vector floating point.
+defm : X86WriteRes<WriteFLD0,       [SLM_FPC_RSV01], 1, [1], 1>;
+defm : X86WriteRes<WriteFLD1,       [SLM_FPC_RSV01], 1, [1], 1>;
 def  : WriteRes<WriteFLoad,         [SLM_MEC_RSV]> { let Latency = 3; }
 def  : WriteRes<WriteFLoadX,        [SLM_MEC_RSV]> { let Latency = 3; }
 def  : WriteRes<WriteFLoadY,        [SLM_MEC_RSV]> { let Latency = 3; }
Index: lib/Target/X86/X86ScheduleZnver1.td
===================================================================
--- lib/Target/X86/X86ScheduleZnver1.td
+++ lib/Target/X86/X86ScheduleZnver1.td
@@ -815,10 +815,10 @@
 }
 
 // FLDZ.
-def : InstRW<[ZnWriteFPU13], (instregex "LD_F0")>;
+def : SchedAlias<WriteFLD0, ZnWriteFPU13>;
 
 // FLD1.
-def : InstRW<[ZnWriteFPU3], (instregex "LD_F1")>;
+def : SchedAlias<WriteFLD1, ZnWriteFPU3>;
 
 // FLDPI FLDL2E etc.
 def : InstRW<[ZnWriteFPU3], (instregex "FLDPI", "FLDL2(T|E)", "FLDL(G|N)2")>;
Index: test/CodeGen/X86/x87-schedule.ll
===================================================================
--- test/CodeGen/X86/x87-schedule.ll
+++ test/CodeGen/X86/x87-schedule.ll
@@ -2849,33 +2849,33 @@
 ; SLM-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; SLM:       # %bb.0:
 ; SLM-NEXT:    #APP
-; SLM-NEXT:    fld1 # sched: [1:?]
+; SLM-NEXT:    fld1 # sched: [1:0.50]
 ; SLM-NEXT:    fldl2e # sched: [100:1.00]
 ; SLM-NEXT:    fldl2t # sched: [100:1.00]
 ; SLM-NEXT:    fldlg2 # sched: [100:1.00]
 ; SLM-NEXT:    fldln2 # sched: [100:1.00]
 ; SLM-NEXT:    fldpi # sched: [100:1.00]
-; SLM-NEXT:    fldz # sched: [1:?]
+; SLM-NEXT:    fldz # sched: [1:0.50]
 ; SLM-NEXT:    #NO_APP
 ; SLM-NEXT:    retl # sched: [4:1.00]
 ;
 ; SANDY-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; SANDY:       # %bb.0:
 ; SANDY-NEXT:    #APP
-; SANDY-NEXT:    fld1 # sched: [1:?]
+; SANDY-NEXT:    fld1 # sched: [1:1.00]
 ; SANDY-NEXT:    fldl2e # sched: [100:0.33]
 ; SANDY-NEXT:    fldl2t # sched: [100:0.33]
 ; SANDY-NEXT:    fldlg2 # sched: [100:0.33]
 ; SANDY-NEXT:    fldln2 # sched: [100:0.33]
 ; SANDY-NEXT:    fldpi # sched: [100:0.33]
-; SANDY-NEXT:    fldz # sched: [1:?]
+; SANDY-NEXT:    fldz # sched: [1:1.00]
 ; SANDY-NEXT:    #NO_APP
 ; SANDY-NEXT:    retl # sched: [6:1.00]
 ;
 ; HASWELL-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; HASWELL:       # %bb.0:
 ; HASWELL-NEXT:    #APP
-; HASWELL-NEXT:    fld1 # sched: [1:?]
+; HASWELL-NEXT:    fld1 # sched: [1:1.00]
 ; HASWELL-NEXT:    fldl2e # sched: [1:0.50]
 ; HASWELL-NEXT:    fldl2t # sched: [1:0.50]
 ; HASWELL-NEXT:    fldlg2 # sched: [1:0.50]
@@ -2888,52 +2888,52 @@
 ; BROADWELL-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; BROADWELL:       # %bb.0:
 ; BROADWELL-NEXT:    #APP
-; BROADWELL-NEXT:    fld1 # sched: [1:?]
+; BROADWELL-NEXT:    fld1 # sched: [1:1.00]
 ; BROADWELL-NEXT:    fldl2e # sched: [100:0.25]
 ; BROADWELL-NEXT:    fldl2t # sched: [100:0.25]
 ; BROADWELL-NEXT:    fldlg2 # sched: [100:0.25]
 ; BROADWELL-NEXT:    fldln2 # sched: [100:0.25]
 ; BROADWELL-NEXT:    fldpi # sched: [100:0.25]
-; BROADWELL-NEXT:    fldz # sched: [1:?]
+; BROADWELL-NEXT:    fldz # sched: [1:0.50]
 ; BROADWELL-NEXT:    #NO_APP
 ; BROADWELL-NEXT:    retl # sched: [6:0.50]
 ;
 ; SKYLAKE-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; SKYLAKE:       # %bb.0:
 ; SKYLAKE-NEXT:    #APP
-; SKYLAKE-NEXT:    fld1 # sched: [1:?]
+; SKYLAKE-NEXT:    fld1 # sched: [1:1.00]
 ; SKYLAKE-NEXT:    fldl2e # sched: [100:0.25]
 ; SKYLAKE-NEXT:    fldl2t # sched: [100:0.25]
 ; SKYLAKE-NEXT:    fldlg2 # sched: [100:0.25]
 ; SKYLAKE-NEXT:    fldln2 # sched: [100:0.25]
 ; SKYLAKE-NEXT:    fldpi # sched: [100:0.25]
-; SKYLAKE-NEXT:    fldz # sched: [1:?]
+; SKYLAKE-NEXT:    fldz # sched: [1:0.50]
 ; SKYLAKE-NEXT:    #NO_APP
 ; SKYLAKE-NEXT:    retl # sched: [6:0.50]
 ;
 ; SKX-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; SKX:       # %bb.0:
 ; SKX-NEXT:    #APP
-; SKX-NEXT:    fld1 # sched: [1:?]
+; SKX-NEXT:    fld1 # sched: [1:1.00]
 ; SKX-NEXT:    fldl2e # sched: [100:0.25]
 ; SKX-NEXT:    fldl2t # sched: [100:0.25]
 ; SKX-NEXT:    fldlg2 # sched: [100:0.25]
 ; SKX-NEXT:    fldln2 # sched: [100:0.25]
 ; SKX-NEXT:    fldpi # sched: [100:0.25]
-; SKX-NEXT:    fldz # sched: [1:?]
+; SKX-NEXT:    fldz # sched: [1:0.50]
 ; SKX-NEXT:    #NO_APP
 ; SKX-NEXT:    retl # sched: [6:0.50]
 ;
 ; BTVER2-LABEL: test_fld1_fldl2e_fldl2t_fldlg2_fldln2_fldpi_fldz:
 ; BTVER2:       # %bb.0:
 ; BTVER2-NEXT:    #APP
-; BTVER2-NEXT:    fld1 # sched: [1:?]
+; BTVER2-NEXT:    fld1 # sched: [3:1.00]
 ; BTVER2-NEXT:    fldl2e # sched: [100:0.50]
 ; BTVER2-NEXT:    fldl2t # sched: [100:0.50]
 ; BTVER2-NEXT:    fldlg2 # sched: [100:0.50]
 ; BTVER2-NEXT:    fldln2 # sched: [100:0.50]
 ; BTVER2-NEXT:    fldpi # sched: [100:0.50]
-; BTVER2-NEXT:    fldz # sched: [1:?]
+; BTVER2-NEXT:    fldz # sched: [3:1.00]
 ; BTVER2-NEXT:    #NO_APP
 ; BTVER2-NEXT:    retl # sched: [4:1.00]
 ;
Index: test/tools/llvm-mca/X86/Broadwell/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/Broadwell/resources-x87.s
+++ test/tools/llvm-mca/X86/Broadwell/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  1      6     0.50    *             *     fldt	(%eax)
 # CHECK-NEXT:  3      7     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  64     60    14.00                 *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  2      1     1.00                  *     fld1
 # CHECK-NEXT:  1      100   0.25                  *     fldl2e
 # CHECK-NEXT:  1      100   0.25                  *     fldl2t
 # CHECK-NEXT:  1      100   0.25                  *     fldlg2
 # CHECK-NEXT:  1      100   0.25                  *     fldln2
 # CHECK-NEXT:  1      100   0.25                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      1     0.50                  *     fldz
 # CHECK-NEXT:  1      5     1.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      5     1.00                  *     fmul	%st(2)
 # CHECK-NEXT:  2      11    1.00    *             *     fmuls	(%ecx)
@@ -369,7 +369,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]
-# CHECK-NEXT:  -     9.00   111.67 140.67 49.00  49.00  27.00  60.67  71.00  9.00
+# CHECK-NEXT:  -     9.00   113.17 142.17 49.00  49.00  27.00  60.67  71.00  9.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    Instructions:
@@ -448,13 +448,13 @@
 # CHECK-NEXT:  -      -      -      -     0.50   0.50    -      -      -      -     fldt	(%eax)
 # CHECK-NEXT:  -      -     1.50   0.50   0.50   0.50    -      -      -      -     fldcw	(%eax)
 # CHECK-NEXT:  -      -     18.92  11.42  4.00   4.00    -     10.92  14.75   -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -     1.00   1.00    -      -      -      -      -      -     fld1
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2e
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2t
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldlg2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldln2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -      -      -     fldz
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -     1.00    -     0.50   0.50    -      -      -      -     fmuls	(%ecx)
Index: test/tools/llvm-mca/X86/BtVer2/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/BtVer2/resources-x87.s
+++ test/tools/llvm-mca/X86/BtVer2/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  1      5     1.00    *             *     fldt	(%eax)
 # CHECK-NEXT:  1      5     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  1      100   0.50                  *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  1      3     1.00                  *     fld1
 # CHECK-NEXT:  1      100   0.50                  *     fldl2e
 # CHECK-NEXT:  1      100   0.50                  *     fldl2t
 # CHECK-NEXT:  1      100   0.50                  *     fldlg2
 # CHECK-NEXT:  1      100   0.50                  *     fldln2
 # CHECK-NEXT:  1      100   0.50                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      3     1.00                  *     fldz
 # CHECK-NEXT:  1      2     1.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      2     1.00                  *     fmul	%st(2)
 # CHECK-NEXT:  1      7     1.00    *             *     fmuls	(%ecx)
@@ -373,7 +373,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]
-# CHECK-NEXT: 44.50  22.50   -     54.00  349.00 54.00  27.00  39.00   -     13.00   -      -      -      -
+# CHECK-NEXT: 44.50  22.50   -     54.00  349.00 54.00  29.00  39.00   -     13.00  2.00    -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]   Instructions:
@@ -452,13 +452,13 @@
 # CHECK-NEXT:  -      -      -      -      -      -      -     1.00    -      -      -      -      -      -     fldt	(%eax)
 # CHECK-NEXT:  -      -      -      -      -      -      -     1.00    -      -      -      -      -      -     fldcw	(%eax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -      -      -      -      -     1.00    -      -      -     1.00    -      -      -     fld1
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldl2e
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldl2t
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldlg2
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldln2
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -      -      -      -      -     1.00    -      -      -     1.00    -      -      -     fldz
 # CHECK-NEXT:  -      -      -      -     1.00    -     1.00    -      -      -      -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -      -      -     1.00    -     1.00    -      -      -      -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -      -      -     1.00    -     1.00   1.00    -      -      -      -      -      -     fmuls	(%ecx)
Index: test/tools/llvm-mca/X86/Haswell/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/Haswell/resources-x87.s
+++ test/tools/llvm-mca/X86/Haswell/resources-x87.s
@@ -281,7 +281,7 @@
 # CHECK-NEXT:  1      7     0.50    *             *     fldt	(%eax)
 # CHECK-NEXT:  3      7     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  64     61    14.00                 *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  2      1     1.00                  *     fld1
 # CHECK-NEXT:  2      1     0.50                  *     fldl2e
 # CHECK-NEXT:  2      1     0.50                  *     fldl2t
 # CHECK-NEXT:  2      1     0.50                  *     fldlg2
@@ -369,7 +369,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]
-# CHECK-NEXT:  -     17.00  117.92 141.92 49.00  49.00  27.00  56.92  65.25  9.00
+# CHECK-NEXT:  -     17.00  118.92 142.92 49.00  49.00  27.00  56.92  65.25  9.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    Instructions:
@@ -448,7 +448,7 @@
 # CHECK-NEXT:  -      -      -      -     0.50   0.50    -      -      -      -     fldt	(%eax)
 # CHECK-NEXT:  -      -     1.50   0.50   0.50   0.50    -      -      -      -     fldcw	(%eax)
 # CHECK-NEXT:  -      -     18.92  11.42  4.00   4.00    -     10.92  14.75   -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -     1.00   1.00    -      -      -      -      -      -     fld1
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -      -      -     fldl2e
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -      -      -     fldl2t
 # CHECK-NEXT:  -      -     0.50   0.50    -      -      -      -      -      -     fldlg2
Index: test/tools/llvm-mca/X86/SLM/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/SLM/resources-x87.s
+++ test/tools/llvm-mca/X86/SLM/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  1      3     1.00    *             *     fldt	(%eax)
 # CHECK-NEXT:  1      3     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  1      100   1.00                  *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  1      1     0.50                  *     fld1
 # CHECK-NEXT:  1      100   1.00                  *     fldl2e
 # CHECK-NEXT:  1      100   1.00                  *     fldl2t
 # CHECK-NEXT:  1      100   1.00                  *     fldlg2
 # CHECK-NEXT:  1      100   1.00                  *     fldln2
 # CHECK-NEXT:  1      100   1.00                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      1     0.50                  *     fldz
 # CHECK-NEXT:  1      5     2.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      5     2.00                  *     fmul	%st(2)
 # CHECK-NEXT:  1      8     2.00    *             *     fmuls	(%ecx)
@@ -367,7 +367,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]
-# CHECK-NEXT:  -     312.00 16.00  64.00  55.00  9.50   9.50   52.00
+# CHECK-NEXT:  -     312.00 16.00  65.00  56.00  9.50   9.50   52.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    Instructions:
@@ -446,13 +446,13 @@
 # CHECK-NEXT:  -      -      -      -      -      -      -     1.00   fldt	(%eax)
 # CHECK-NEXT:  -      -      -      -      -      -      -     1.00   fldcw	(%eax)
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -      -     0.50   0.50    -      -      -     fld1
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldl2e
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldl2t
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldlg2
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldln2
 # CHECK-NEXT:  -      -      -     1.00    -      -      -      -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -      -     0.50   0.50    -      -      -     fldz
 # CHECK-NEXT:  -      -     2.00   1.00    -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -     2.00   1.00    -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -     2.00   1.00    -      -      -     1.00   fmuls	(%ecx)
Index: test/tools/llvm-mca/X86/SandyBridge/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/SandyBridge/resources-x87.s
+++ test/tools/llvm-mca/X86/SandyBridge/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  3      9     1.00    *             *     fldt	(%eax)
 # CHECK-NEXT:  5      8     2.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  1      100   0.33                  *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  2      1     1.00                  *     fld1
 # CHECK-NEXT:  1      100   0.33                  *     fldl2e
 # CHECK-NEXT:  1      100   0.33                  *     fldl2t
 # CHECK-NEXT:  1      100   0.33                  *     fldlg2
 # CHECK-NEXT:  1      100   0.33                  *     fldln2
 # CHECK-NEXT:  1      100   0.33                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      1     1.00                  *     fldz
 # CHECK-NEXT:  1      5     1.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      5     1.00                  *     fmul	%st(2)
 # CHECK-NEXT:  2      12    1.00    *             *     fmuls	(%ecx)
@@ -367,7 +367,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6.0]  [6.1]
-# CHECK-NEXT:  -     136.00 48.33  87.33  17.00  54.33  34.00  34.00
+# CHECK-NEXT:  -     136.00 49.33  87.33  17.00  56.33  34.00  34.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6.0]  [6.1]  Instructions:
@@ -446,13 +446,13 @@
 # CHECK-NEXT:  -      -     0.50   0.50    -     1.00   0.50   0.50   fldt	(%eax)
 # CHECK-NEXT:  -      -      -      -     1.00   2.00   1.00   1.00   fldcw	(%eax)
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -     1.00    -      -     1.00    -      -     fld1
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldl2e
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldl2t
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldlg2
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldln2
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -      -      -      -     1.00    -      -     fldz
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -     1.00    -      -      -     0.50   0.50   fmuls	(%ecx)
Index: test/tools/llvm-mca/X86/SkylakeClient/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/SkylakeClient/resources-x87.s
+++ test/tools/llvm-mca/X86/SkylakeClient/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  1      7     0.50    *             *     fldt	(%eax)
 # CHECK-NEXT:  3      7     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  64     62    14.00                 *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  2      1     1.00                  *     fld1
 # CHECK-NEXT:  1      100   0.25                  *     fldl2e
 # CHECK-NEXT:  1      100   0.25                  *     fldl2t
 # CHECK-NEXT:  1      100   0.25                  *     fldlg2
 # CHECK-NEXT:  1      100   0.25                  *     fldln2
 # CHECK-NEXT:  1      100   0.25                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      1     0.50                  *     fldz
 # CHECK-NEXT:  1      4     1.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      4     1.00                  *     fmul	%st(2)
 # CHECK-NEXT:  2      11    1.00    *             *     fmuls	(%ecx)
@@ -369,7 +369,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]
-# CHECK-NEXT:  -     7.00   121.50 53.50  49.00  49.00  27.00  144.50 70.50  9.00
+# CHECK-NEXT:  -     7.00   123.00 53.50  49.00  49.00  27.00  146.00 70.50  9.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    Instructions:
@@ -448,13 +448,13 @@
 # CHECK-NEXT:  -      -      -      -     0.50   0.50    -      -      -      -     fldt	(%eax)
 # CHECK-NEXT:  -      -     1.50    -     0.50   0.50    -     0.50    -      -     fldcw	(%eax)
 # CHECK-NEXT:  -      -     19.25  9.75   4.00   4.00    -     12.25  14.75   -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -     1.00    -      -      -      -     1.00    -      -     fld1
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2e
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2t
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldlg2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldln2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -     0.50    -      -      -      -     0.50    -      -     fldz
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -     1.00    -     0.50   0.50    -      -      -      -     fmuls	(%ecx)
Index: test/tools/llvm-mca/X86/SkylakeServer/resources-x87.s
===================================================================
--- test/tools/llvm-mca/X86/SkylakeServer/resources-x87.s
+++ test/tools/llvm-mca/X86/SkylakeServer/resources-x87.s
@@ -281,13 +281,13 @@
 # CHECK-NEXT:  1      7     0.50    *             *     fldt	(%eax)
 # CHECK-NEXT:  3      7     1.00    *             *     fldcw	(%eax)
 # CHECK-NEXT:  64     62    14.00                 *     fldenv	(%eax)
-# CHECK-NEXT:  1      1      -                    *     fld1
+# CHECK-NEXT:  2      1     1.00                  *     fld1
 # CHECK-NEXT:  1      100   0.25                  *     fldl2e
 # CHECK-NEXT:  1      100   0.25                  *     fldl2t
 # CHECK-NEXT:  1      100   0.25                  *     fldlg2
 # CHECK-NEXT:  1      100   0.25                  *     fldln2
 # CHECK-NEXT:  1      100   0.25                  *     fldpi
-# CHECK-NEXT:  1      1      -                    *     fldz
+# CHECK-NEXT:  1      1     0.50                  *     fldz
 # CHECK-NEXT:  1      4     1.00                  *     fmul	%st(0), %st(1)
 # CHECK-NEXT:  1      4     1.00                  *     fmul	%st(2)
 # CHECK-NEXT:  2      11    1.00    *             *     fmuls	(%ecx)
@@ -369,7 +369,7 @@
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]
-# CHECK-NEXT:  -     7.00   121.50 53.50  49.00  49.00  27.00  144.50 70.50  9.00
+# CHECK-NEXT:  -     7.00   123.00 53.50  49.00  49.00  27.00  146.00 70.50  9.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    Instructions:
@@ -448,13 +448,13 @@
 # CHECK-NEXT:  -      -      -      -     0.50   0.50    -      -      -      -     fldt	(%eax)
 # CHECK-NEXT:  -      -     1.50    -     0.50   0.50    -     0.50    -      -     fldcw	(%eax)
 # CHECK-NEXT:  -      -     19.25  9.75   4.00   4.00    -     12.25  14.75   -     fldenv	(%eax)
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fld1
+# CHECK-NEXT:  -      -     1.00    -      -      -      -     1.00    -      -     fld1
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2e
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldl2t
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldlg2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldln2
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     fldpi
-# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     fldz
+# CHECK-NEXT:  -      -     0.50    -      -      -      -     0.50    -      -     fldz
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(0), %st(1)
 # CHECK-NEXT:  -      -     1.00    -      -      -      -      -      -      -     fmul	%st(2)
 # CHECK-NEXT:  -      -     1.00    -     0.50   0.50    -      -      -      -     fmuls	(%ecx)