Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
===================================================================
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2939,6 +2939,10 @@
                                        Node->getValueType(0))
         == TargetLowering::Legal)
       break;
+    // We cannot expand if the stack convert is not legal
+    if (!TLI.isTruncStoreLegalOrCustom(Node->getOperand(1)->getValueType(0),
+                                       Node->getValueType(0)))
+      break;
     // We fall back to use stack operation when the FP_ROUND operation
     // isn't available.
     Tmp1 = EmitStackConvert(Node->getOperand(1), 
Index: llvm/test/CodeGen/AArch64/fp-intrinsics.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AArch64/fp-intrinsics.ll
@@ -0,0 +1,536 @@
+; RUN: llc -mtriple=aarch64-none-eabi %s -o - | FileCheck %s
+
+; Check that constrained fp intrinsics are correctly lowered.
+
+; FIXME: We're not generating the right instructions for some of these
+; operations (see further FIXMEs down below).
+
+; Single-precision intrinsics
+
+; CHECK-LABEL: add_f32:
+; CHECK: fadd s0, s0, s1
+define float @add_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.fadd.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: sub_f32:
+; CHECK: fsub s0, s0, s1
+define float @sub_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.fsub.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: mul_f32:
+; CHECK: fmul s0, s0, s1
+define float @mul_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.fmul.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: div_f32:
+; CHECK: fdiv s0, s0, s1
+define float @div_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.fdiv.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: frem_f32:
+; CHECK: bl fmodf
+define float @frem_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.frem.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: fma_f32:
+; CHECK: fmadd s0, s0, s1, s2
+define float @fma_f32(float %x, float %y, float %z) #0 {
+  %val = call float @llvm.experimental.constrained.fma.f32(float %x, float %y, float %z, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: fptosi_f32:
+; CHECK: fcvtzs w0, s0
+define i32 @fptosi_f32(float %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.fptosi.f32(float %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: fptoui_f32:
+; FIXME-CHECK: fcvtzu w0, s0
+define i32 @fptoui_f32(float %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.fptoui.f32(float %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: sqrt_f32:
+; CHECK: fsqrt s0, s0
+define float @sqrt_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.sqrt.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: powi_f32:
+; CHECK: bl __powisf2
+define float @powi_f32(float %x, i32 %y) #0 {
+  %val = call float @llvm.experimental.constrained.powi.f32(float %x, i32 %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: sin_f32:
+; CHECK: bl sinf
+define float @sin_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.sin.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: cos_f32:
+; CHECK: bl cosf
+define float @cos_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.cos.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: pow_f32:
+; CHECK: bl powf
+define float @pow_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.pow.f32(float %x, float %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: log_f32:
+; CHECK: bl logf
+define float @log_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.log.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: log10_f32:
+; CHECK: bl log10f
+define float @log10_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.log10.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: log2_f32:
+; CHECK: bl log2f
+define float @log2_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.log2.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: exp_f32:
+; CHECK: bl expf
+define float @exp_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.exp.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: exp2_f32:
+; CHECK: bl exp2f
+define float @exp2_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.exp2.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: rint_f32:
+; CHECK: frintx s0, s0
+define float @rint_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.rint.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: nearbyint_f32:
+; CHECK: frinti s0, s0
+define float @nearbyint_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.nearbyint.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: lrint_f32:
+; CHECK: frintx [[REG:s[0-9]+]], s0
+; CHECK: fcvtzs w0, [[REG]]
+define i32 @lrint_f32(float %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.lrint.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: llrint_f32:
+; CHECK: frintx [[REG:s[0-9]+]], s0
+; CHECK: fcvtzs x0, [[REG]]
+define i64 @llrint_f32(float %x) #0 {
+  %val = call i64 @llvm.experimental.constrained.llrint.f32(float %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret i64 %val
+}
+
+; CHECK-LABEL: maxnum_f32:
+; CHECK: fmaxnm s0, s0, s1
+define float @maxnum_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.maxnum.f32(float %x, float %y, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: minnum_f32:
+; CHECK: fminnm s0, s0, s1
+define float @minnum_f32(float %x, float %y) #0 {
+  %val = call float @llvm.experimental.constrained.minnum.f32(float %x, float %y, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: ceil_f32:
+; CHECK: frintp s0, s0
+define float @ceil_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.ceil.f32(float %x, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: floor_f32:
+; CHECK: frintm s0, s0
+define float @floor_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.floor.f32(float %x, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: lround_f32:
+; CHECK: fcvtas w0, s0
+define i32 @lround_f32(float %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.lround.f32(float %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: llround_f32:
+; CHECK: fcvtas x0, s0
+define i64 @llround_f32(float %x) #0 {
+  %val = call i64 @llvm.experimental.constrained.llround.f32(float %x, metadata !"fpexcept.strict") #0
+  ret i64 %val
+}
+
+; CHECK-LABEL: round_f32:
+; CHECK: frinta s0, s0
+define float @round_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.round.f32(float %x, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: trunc_f32:
+; CHECK: frintz s0, s0
+define float @trunc_f32(float %x) #0 {
+  %val = call float @llvm.experimental.constrained.trunc.f32(float %x, metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+
+; Double-precision intrinsics
+
+; CHECK-LABEL: add_f64:
+; CHECK: fadd d0, d0, d1
+define double @add_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.fadd.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: sub_f64:
+; CHECK: fsub d0, d0, d1
+define double @sub_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.fsub.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: mul_f64:
+; CHECK: fmul d0, d0, d1
+define double @mul_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.fmul.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: div_f64:
+; CHECK: fdiv d0, d0, d1
+define double @div_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.fdiv.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: frem_f64:
+; CHECK: bl fmod
+define double @frem_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.frem.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: fma_f64:
+; CHECK: fmadd d0, d0, d1, d2
+define double @fma_f64(double %x, double %y, double %z) #0 {
+  %val = call double @llvm.experimental.constrained.fma.f64(double %x, double %y, double %z, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: fptosi_f64:
+; CHECK: fcvtzs w0, d0
+define i32 @fptosi_f64(double %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.fptosi.f64(double %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: fptoui_f64:
+; FIXME-CHECK: fcvtzu w0, d0
+define i32 @fptoui_f64(double %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.fptoui.f64(double %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: sqrt_f64:
+; CHECK: fsqrt d0, d0
+define double @sqrt_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.sqrt.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: powi_f64:
+; CHECK: bl __powidf2
+define double @powi_f64(double %x, i32 %y) #0 {
+  %val = call double @llvm.experimental.constrained.powi.f64(double %x, i32 %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: sin_f64:
+; CHECK: bl sin
+define double @sin_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.sin.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: cos_f64:
+; CHECK: bl cos
+define double @cos_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.cos.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: pow_f64:
+; CHECK: bl pow
+define double @pow_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.pow.f64(double %x, double %y, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: log_f64:
+; CHECK: bl log
+define double @log_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.log.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: log10_f64:
+; CHECK: bl log10
+define double @log10_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.log10.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: log2_f64:
+; CHECK: bl log2
+define double @log2_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.log2.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: exp_f64:
+; CHECK: bl exp
+define double @exp_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.exp.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: exp2_f64:
+; CHECK: bl exp2
+define double @exp2_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.exp2.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: rint_f64:
+; CHECK: frintx d0, d0
+define double @rint_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.rint.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: nearbyint_f64:
+; CHECK: frinti d0, d0
+define double @nearbyint_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.nearbyint.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: lrint_f64:
+; CHECK: frintx [[REG:d[0-9]+]], d0
+; CHECK: fcvtzs w0, [[REG]]
+define i32 @lrint_f64(double %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.lrint.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: llrint_f64:
+; CHECK: frintx [[REG:d[0-9]+]], d0
+; CHECK: fcvtzs x0, [[REG]]
+define i64 @llrint_f64(double %x) #0 {
+  %val = call i64 @llvm.experimental.constrained.llrint.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret i64 %val
+}
+
+; CHECK-LABEL: maxnum_f64:
+; CHECK: fmaxnm d0, d0, d1
+define double @maxnum_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.maxnum.f64(double %x, double %y, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: minnum_f64:
+; CHECK: fminnm d0, d0, d1
+define double @minnum_f64(double %x, double %y) #0 {
+  %val = call double @llvm.experimental.constrained.minnum.f64(double %x, double %y, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: ceil_f64:
+; CHECK: frintp d0, d0
+define double @ceil_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.ceil.f64(double %x, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: floor_f64:
+; CHECK: frintm d0, d0
+define double @floor_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.floor.f64(double %x, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: lround_f64:
+; CHECK: fcvtas w0, d0
+define i32 @lround_f64(double %x) #0 {
+  %val = call i32 @llvm.experimental.constrained.lround.f64(double %x, metadata !"fpexcept.strict") #0
+  ret i32 %val
+}
+
+; CHECK-LABEL: llround_f64:
+; CHECK: fcvtas x0, d0
+define i64 @llround_f64(double %x) #0 {
+  %val = call i64 @llvm.experimental.constrained.llround.f64(double %x, metadata !"fpexcept.strict") #0
+  ret i64 %val
+}
+
+; CHECK-LABEL: round_f64:
+; CHECK: frinta d0, d0
+define double @round_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.round.f64(double %x, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: trunc_f64:
+; CHECK: frintz d0, d0
+define double @trunc_f64(double %x) #0 {
+  %val = call double @llvm.experimental.constrained.trunc.f64(double %x, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+
+; Single/Double conversion intrinsics
+
+; CHECK-LABEL: fptrunc_f32:
+; CHECK: fcvt s0, d0
+define float @fptrunc_f32(double %x) #0 {
+  %val = call float @llvm.experimental.constrained.fptrunc.f32.f64(double %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: fpext_f32:
+; CHECK: fcvt d0, s0
+define double @fpext_f32(float %x) #0 {
+  %val = call double @llvm.experimental.constrained.fpext.f64.f32(float %x, metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+; CHECK-LABEL: sitofp_f32_i32:
+; FIXME-CHECK: scvtf s0, w0
+define float @sitofp_f32_i32(i32 %x) #0 {
+  %val = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %val
+}
+
+; CHECK-LABEL: sitofp_f64_i32:
+; FIXME-CHECK: scvtf d0, w0
+define double @sitofp_f64_i32(i32 %x) #0 {
+  %val = call double @llvm.experimental.constrained.sitofp.f64.i32(i32 %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret double %val
+}
+
+
+attributes #0 = { strictfp }
+
+declare float @llvm.experimental.constrained.fadd.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.fmul.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.fdiv.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.frem.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.fma.f32(float, float, float, metadata, metadata)
+declare i32 @llvm.experimental.constrained.fptosi.f32(float, metadata)
+declare i32 @llvm.experimental.constrained.fptoui.f32(float, metadata)
+declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.powi.f32(float, i32, metadata, metadata)
+declare float @llvm.experimental.constrained.sin.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.cos.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.pow.f32(float, float, metadata, metadata)
+declare float @llvm.experimental.constrained.log.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.log10.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.log2.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.exp.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.exp2.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.rint.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.nearbyint.f32(float, metadata, metadata)
+declare i32 @llvm.experimental.constrained.lrint.f32(float, metadata, metadata)
+declare i64 @llvm.experimental.constrained.llrint.f32(float, metadata, metadata)
+declare float @llvm.experimental.constrained.maxnum.f32(float, float, metadata)
+declare float @llvm.experimental.constrained.minnum.f32(float, float, metadata)
+declare float @llvm.experimental.constrained.ceil.f32(float, metadata)
+declare float @llvm.experimental.constrained.floor.f32(float, metadata)
+declare i32 @llvm.experimental.constrained.lround.f32(float, metadata)
+declare i64 @llvm.experimental.constrained.llround.f32(float, metadata)
+declare float @llvm.experimental.constrained.round.f32(float, metadata)
+declare float @llvm.experimental.constrained.trunc.f32(float, metadata)
+
+declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.fsub.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.fmul.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.fdiv.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.frem.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.fma.f64(double, double, double, metadata, metadata)
+declare i32 @llvm.experimental.constrained.fptosi.f64(double, metadata)
+declare i32 @llvm.experimental.constrained.fptoui.f64(double, metadata)
+declare double @llvm.experimental.constrained.sqrt.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.powi.f64(double, i32, metadata, metadata)
+declare double @llvm.experimental.constrained.sin.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.cos.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.pow.f64(double, double, metadata, metadata)
+declare double @llvm.experimental.constrained.log.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.log10.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.log2.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.exp.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.exp2.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.rint.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.nearbyint.f64(double, metadata, metadata)
+declare i32 @llvm.experimental.constrained.lrint.f64(double, metadata, metadata)
+declare i64 @llvm.experimental.constrained.llrint.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.maxnum.f64(double, double, metadata)
+declare double @llvm.experimental.constrained.minnum.f64(double, double, metadata)
+declare double @llvm.experimental.constrained.ceil.f64(double, metadata)
+declare double @llvm.experimental.constrained.floor.f64(double, metadata)
+declare i32 @llvm.experimental.constrained.lround.f64(double, metadata)
+declare i64 @llvm.experimental.constrained.llround.f64(double, metadata)
+declare double @llvm.experimental.constrained.round.f64(double, metadata)
+declare double @llvm.experimental.constrained.trunc.f64(double, metadata)
+
+declare float @llvm.experimental.constrained.fptrunc.f32.f64(double, metadata, metadata)
+declare double @llvm.experimental.constrained.fpext.f64.f32(float, metadata)
+declare float @llvm.experimental.constrained.sitofp.f32.i32(i32, metadata, metadata)
+declare double @llvm.experimental.constrained.sitofp.f64.i32(i32, metadata, metadata)