diff --git a/llvm/lib/Target/ARM/ARMFrameLowering.cpp b/llvm/lib/Target/ARM/ARMFrameLowering.cpp
--- a/llvm/lib/Target/ARM/ARMFrameLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMFrameLowering.cpp
@@ -3168,12 +3168,12 @@
       .addReg(ScratchReg1)
       .add(predOps(ARMCC::AL));
 
-  // This jump is taken if StackLimit < SP - stack required.
+  // This jump is taken if StackLimit <= SP - stack required.
   Opcode = Thumb ? ARM::tBcc : ARM::Bcc;
-  BuildMI(GetMBB, DL, TII.get(Opcode)).addMBB(PostStackMBB)
-       .addImm(ARMCC::LO)
-       .addReg(ARM::CPSR);
-
+  BuildMI(GetMBB, DL, TII.get(Opcode))
+      .addMBB(PostStackMBB)
+      .addImm(ARMCC::LS)
+      .addReg(ARM::CPSR);
 
   // Calling __morestack(StackSize, Size of stack arguments).
   // __morestack knows that the stack size requested is in SR0(r4)
diff --git a/llvm/test/CodeGen/ARM/debug-segmented-stacks.ll b/llvm/test/CodeGen/ARM/debug-segmented-stacks.ll
--- a/llvm/test/CodeGen/ARM/debug-segmented-stacks.ll
+++ b/llvm/test/CodeGen/ARM/debug-segmented-stacks.ll
@@ -20,7 +20,7 @@
 ; ARM-linux-NEXT: mov     r5, sp
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB0_2
+; ARM-linux-NEXT: bls     .LBB0_2
 
 ; ARM-linux:      mov     r4, #48
 ; ARM-linux-NEXT: mov     r5, #0
diff --git a/llvm/test/CodeGen/ARM/segmented-stacks-dynamic.ll b/llvm/test/CodeGen/ARM/segmented-stacks-dynamic.ll
--- a/llvm/test/CodeGen/ARM/segmented-stacks-dynamic.ll
+++ b/llvm/test/CodeGen/ARM/segmented-stacks-dynamic.ll
@@ -27,7 +27,7 @@
 ; ARM-linux-NEXT: mov     r5, sp
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB0_2
+; ARM-linux-NEXT: bls     .LBB0_2
 
 ; ARM-linux:      mov     r4, #16
 ; ARM-linux-NEXT: mov     r5, #0
@@ -47,7 +47,7 @@
 ; ARM-android-NEXT: mov     r5, sp
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB0_2
+; ARM-android-NEXT: bls     .LBB0_2
 
 ; ARM-android:      mov     r4, #16
 ; ARM-android-NEXT: mov     r5, #0
diff --git a/llvm/test/CodeGen/ARM/segmented-stacks.ll b/llvm/test/CodeGen/ARM/segmented-stacks.ll
--- a/llvm/test/CodeGen/ARM/segmented-stacks.ll
+++ b/llvm/test/CodeGen/ARM/segmented-stacks.ll
@@ -21,7 +21,7 @@
 ; ARM-linux-NEXT: mov     r5, sp
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB0_2
+; ARM-linux-NEXT: bls     .LBB0_2
 
 ; ARM-linux:      mov     r4, #48
 ; ARM-linux-NEXT: mov     r5, #0
@@ -40,7 +40,7 @@
 ; ARM-android-NEXT: mov     r5, sp
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB0_2
+; ARM-android-NEXT: bls     .LBB0_2
 
 ; ARM-android:      mov     r4, #48
 ; ARM-android-NEXT: mov     r5, #0
@@ -68,7 +68,7 @@
 ; ARM-linux-NEXT: mov     r5, sp
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB1_2
+; ARM-linux-NEXT: bls     .LBB1_2
 
 ; ARM-linux:      mov     r4, #56
 ; ARM-linux-NEXT: mov     r5, #0
@@ -87,7 +87,7 @@
 ; ARM-android-NEXT: mov     r5, sp
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB1_2
+; ARM-android-NEXT: bls     .LBB1_2
 
 ; ARM-android:      mov     r4, #56
 ; ARM-android-NEXT: mov     r5, #0
@@ -114,7 +114,7 @@
 ; ARM-linux-NEXT: mrc     p15, #0, r4, c13, c0, #3
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB2_2
+; ARM-linux-NEXT: bls     .LBB2_2
 
 ; ARM-linux:      ldr     r4, .LCPI2_0
 ; ARM-linux-NEXT: mov     r5, #0
@@ -137,7 +137,7 @@
 ; ARM-android-NEXT: mrc     p15, #0, r4, c13, c0, #3
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB2_2
+; ARM-android-NEXT: bls     .LBB2_2
 
 ; ARM-android:      ldr     r4, .LCPI2_0
 ; ARM-android-NEXT: mov     r5, #0
@@ -166,7 +166,7 @@
 ; ARM-linux-NEXT: mov     r5, sp
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB3_2
+; ARM-linux-NEXT: bls     .LBB3_2
 
 ; ARM-linux:      mov     r4, #48
 ; ARM-linux-NEXT: mov     r5, #0
@@ -185,7 +185,7 @@
 ; ARM-android-NEXT: mov     r5, sp
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB3_2
+; ARM-android-NEXT: bls     .LBB3_2
 
 ; ARM-android:      mov     r4, #48
 ; ARM-android-NEXT: mov     r5, #0
@@ -212,7 +212,7 @@
 ; ARM-linux-NEXT: mrc     p15, #0, r4, c13, c0, #3
 ; ARM-linux-NEXT: ldr     r4, [r4, #4]
 ; ARM-linux-NEXT: cmp     r4, r5
-; ARM-linux-NEXT: blo     .LBB4_2
+; ARM-linux-NEXT: bls     .LBB4_2
 
 ; ARM-linux:      ldr     r4, .LCPI4_0
 ; ARM-linux-NEXT: mov     r5, #0
@@ -235,7 +235,7 @@
 ; ARM-android-NEXT: mrc     p15, #0, r4, c13, c0, #3
 ; ARM-android-NEXT: ldr     r4, [r4, #252]
 ; ARM-android-NEXT: cmp     r4, r5
-; ARM-android-NEXT: blo     .LBB4_2
+; ARM-android-NEXT: bls     .LBB4_2
 
 ; ARM-android:      ldr     r4, .LCPI4_0
 ; ARM-android-NEXT: mov     r5, #0
diff --git a/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll b/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll
--- a/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll
+++ b/llvm/test/CodeGen/Thumb/segmented-stacks-dynamic.ll
@@ -27,7 +27,7 @@
 ; Thumb-linux-NEXT: ldr r4, .LCPI0_0
 ; Thumb-linux-NEXT: ldr r4, [r4]
 ; Thumb-linux-NEXT: cmp	r4, r5
-; Thumb-linux-NEXT: blo	.LBB0_2
+; Thumb-linux-NEXT: bls	.LBB0_2
 
 ; Thumb-linux:      mov r4, #16
 ; Thumb-linux-NEXT: mov r5, #0
@@ -47,7 +47,7 @@
 ; Thumb-android-NEXT: ldr r4, .LCPI0_0
 ; Thumb-android-NEXT: ldr r4, [r4]
 ; Thumb-android-NEXT: cmp	r4, r5
-; Thumb-android-NEXT: blo	.LBB0_2
+; Thumb-android-NEXT: bls	.LBB0_2
 
 ; Thumb-android:      mov r4, #16
 ; Thumb-android-NEXT: mov r5, #0
diff --git a/llvm/test/CodeGen/Thumb/segmented-stacks.ll b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
--- a/llvm/test/CodeGen/Thumb/segmented-stacks.ll
+++ b/llvm/test/CodeGen/Thumb/segmented-stacks.ll
@@ -19,7 +19,7 @@
 ; Thumb-android-NEXT: ldr     r4, .LCPI0_0
 ; Thumb-android-NEXT: ldr     r4, [r4]
 ; Thumb-android-NEXT: cmp     r4, r5
-; Thumb-android-NEXT: blo     .LBB0_2
+; Thumb-android-NEXT: bls     .LBB0_2
 
 ; Thumb-android:      mov     r4, #48
 ; Thumb-android-NEXT: mov     r5, #0
@@ -43,7 +43,7 @@
 ; Thumb-linux-NEXT: ldr     r4, .LCPI0_0
 ; Thumb-linux-NEXT: ldr     r4, [r4]
 ; Thumb-linux-NEXT: cmp     r4, r5
-; Thumb-linux-NEXT: blo     .LBB0_2
+; Thumb-linux-NEXT: bls     .LBB0_2
 
 ; Thumb-linux:      mov     r4, #48
 ; Thumb-linux-NEXT: mov     r5, #0
@@ -72,7 +72,7 @@
 ; Thumb-android-NEXT: ldr     r4, .LCPI1_0
 ; Thumb-android-NEXT: ldr     r4, [r4]
 ; Thumb-android-NEXT: cmp     r4, r5
-; Thumb-android-NEXT: blo     .LBB1_2
+; Thumb-android-NEXT: bls     .LBB1_2
 
 ; Thumb-android:      mov     r4, #56
 ; Thumb-android-NEXT: mov     r5, #0
@@ -92,7 +92,7 @@
 ; Thumb-linux-NEXT: ldr     r4, .LCPI1_0
 ; Thumb-linux-NEXT: ldr     r4, [r4]
 ; Thumb-linux-NEXT: cmp     r4, r5
-; Thumb-linux-NEXT: blo     .LBB1_2
+; Thumb-linux-NEXT: bls     .LBB1_2
 
 ; Thumb-linux:      mov     r4, #56
 ; Thumb-linux-NEXT: mov     r5, #0
@@ -121,7 +121,7 @@
 ; Thumb-android-NEXT: ldr     r4, .LCPI2_3
 ; Thumb-android-NEXT: ldr     r4, [r4]
 ; Thumb-android-NEXT: cmp     r4, r5
-; Thumb-android-NEXT: blo     .LBB2_2
+; Thumb-android-NEXT: bls     .LBB2_2
 
 ; Thumb-android:      ldr     r4, .LCPI2_2
 ; Thumb-android-NEXT: mov     r5, #0
@@ -146,7 +146,7 @@
 ; Thumb-linux-NEXT: ldr     r4, .LCPI2_3
 ; Thumb-linux-NEXT: ldr     r4, [r4]
 ; Thumb-linux-NEXT: cmp     r4, r5
-; Thumb-linux-NEXT: blo     .LBB2_2
+; Thumb-linux-NEXT: bls     .LBB2_2
 
 ; Thumb-linux:      ldr     r4, .LCPI2_2
 ; Thumb-linux-NEXT: mov     r5, #0
@@ -173,7 +173,7 @@
 ; Thumb-android-NEXT: ldr     r4, .LCPI3_0
 ; Thumb-android-NEXT: ldr     r4, [r4]
 ; Thumb-android-NEXT: cmp     r4, r5
-; Thumb-android-NEXT: blo     .LBB3_2
+; Thumb-android-NEXT: bls     .LBB3_2
 
 ; Thumb-android:      mov     r4, #48
 ; Thumb-android-NEXT: mov     r5, #0
@@ -193,7 +193,7 @@
 ; Thumb-linux-NEXT: ldr     r4, .LCPI3_0
 ; Thumb-linux-NEXT: ldr     r4, [r4]
 ; Thumb-linux-NEXT: cmp     r4, r5
-; Thumb-linux-NEXT: blo     .LBB3_2
+; Thumb-linux-NEXT: bls     .LBB3_2
 
 ; Thumb-linux:      mov     r4, #48
 ; Thumb-linux-NEXT: mov     r5, #0
@@ -222,7 +222,7 @@
 ; Thumb-android-NEXT: ldr     r4, .LCPI4_3
 ; Thumb-android-NEXT: ldr     r4, [r4]
 ; Thumb-android-NEXT: cmp     r4, r5
-; Thumb-android-NEXT: blo     .LBB4_2
+; Thumb-android-NEXT: bls     .LBB4_2
 
 ; Thumb-android:      ldr     r4, .LCPI4_2
 ; Thumb-android-NEXT: mov     r5, #0
@@ -247,7 +247,7 @@
 ; Thumb-linux-NEXT: ldr     r4, .LCPI4_3
 ; Thumb-linux-NEXT: ldr     r4, [r4]
 ; Thumb-linux-NEXT: cmp     r4, r5
-; Thumb-linux-NEXT: blo     .LBB4_2
+; Thumb-linux-NEXT: bls     .LBB4_2
 
 ; Thumb-linux:      ldr     r4, .LCPI4_2
 ; Thumb-linux-NEXT: mov     r5, #0
diff --git a/llvm/test/CodeGen/Thumb2/segmented-stacks.ll b/llvm/test/CodeGen/Thumb2/segmented-stacks.ll
--- a/llvm/test/CodeGen/Thumb2/segmented-stacks.ll
+++ b/llvm/test/CodeGen/Thumb2/segmented-stacks.ll
@@ -14,7 +14,7 @@
 ; THUMB-NEXT:    mov r5, sp
 ; THUMB-NEXT:    ldr.w r4, [r4, #252]
 ; THUMB-NEXT:    cmp r4, r5
-; THUMB-NEXT:    blo .LBB0_2
+; THUMB-NEXT:    bls .LBB0_2
 ; THUMB-NEXT:  @ %bb.1:
 ; THUMB-NEXT:    mov r4, #48
 ; THUMB-NEXT:    mov r5, #0
@@ -42,7 +42,7 @@
 ; ARM-NEXT:    mov r5, sp
 ; ARM-NEXT:    ldr r4, [r4, #252]
 ; ARM-NEXT:    cmp r4, r5
-; ARM-NEXT:    blo .LBB0_2
+; ARM-NEXT:    bls .LBB0_2
 ; ARM-NEXT:  @ %bb.1:
 ; ARM-NEXT:    mov r4, #48
 ; ARM-NEXT:    mov r5, #0
@@ -82,7 +82,7 @@
 ; THUMB-NEXT:    mrc     p15, #0, r4, c13, c0, #3
 ; THUMB-NEXT:    ldr.w   r4, [r4, #252]
 ; THUMB-NEXT:    cmp     r4, r5
-; THUMB-NEXT:    blo     .LBB1_2
+; THUMB-NEXT:    bls     .LBB1_2
 
 ; THUMB:         movw    r4, #40192
 ; THUMB-NEXT:    movt    r4, #0
@@ -104,7 +104,7 @@
 ; ARM-NEXT:    mrc     p15, #0, r4, c13, c0, #3
 ; ARM-NEXT:    ldr     r4, [r4, #252]
 ; ARM-NEXT:    cmp     r4, r5
-; ARM-NEXT:    blo     .LBB1_2
+; ARM-NEXT:    bls     .LBB1_2
 
 ; ARM:         ldr     r4, .LCPI1_0
 ; ARM-NEXT:    mov     r5, #0
@@ -136,7 +136,7 @@
 ; THUMB-NEXT:    mrc     p15, #0, r4, c13, c0, #3
 ; THUMB-NEXT:    ldr.w   r4, [r4, #252]
 ; THUMB-NEXT:    cmp     r4, r5
-; THUMB-NEXT:    blo     .LBB2_2
+; THUMB-NEXT:    bls     .LBB2_2
 
 ; THUMB:         movw    r4, #40192
 ; THUMB-NEXT:    movt    r4, #0
@@ -157,7 +157,7 @@
 ; ARM-NEXT:    mrc     p15, #0, r4, c13, c0, #3
 ; ARM-NEXT:    ldr     r4, [r4, #252]
 ; ARM-NEXT:    cmp     r4, r5
-; ARM-NEXT:    blo     .LBB2_2
+; ARM-NEXT:    bls     .LBB2_2
 
 ; ARM:         ldr     r4, .LCPI2_0
 ; ARM-NEXT:    mov     r5, #0