forked from OSchip/llvm-project
220 lines
5.8 KiB
LLVM
220 lines
5.8 KiB
LLVM
; Verify that strict FP operations are not rescheduled
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata)
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declare float @llvm.sqrt.f32(float)
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declare void @llvm.s390.sfpc(i32)
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; The basic assumption of all following tests is that on z13, we never
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; want to see two square root instructions directly in a row, so the
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; post-RA scheduler will always schedule something else in between
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; whenever possible.
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; We can move any FP operation across a (normal) store.
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define void @f1(float %f1, float %f2, float *%ptr1, float *%ptr2) {
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; CHECK-LABEL: f1:
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.sqrt.f32(float %f1)
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%sqrt2 = call float @llvm.sqrt.f32(float %f2)
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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define void @f2(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f2:
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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define void @f3(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f3:
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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; We can move a non-strict FP operation or a fpexcept.ignore
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; operation even across a volatile store, but not a fpexcept.strict
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; operation.
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define void @f4(float %f1, float %f2, float *%ptr1, float *%ptr2) {
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; CHECK-LABEL: f4:
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.sqrt.f32(float %f1)
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%sqrt2 = call float @llvm.sqrt.f32(float %f2)
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store volatile float %sqrt1, float *%ptr1
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store volatile float %sqrt2, float *%ptr2
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ret void
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}
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define void @f5(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f5:
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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store volatile float %sqrt1, float *%ptr1
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store volatile float %sqrt2, float *%ptr2
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ret void
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}
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define void @f6(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f6:
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; CHECK: sqebr
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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store volatile float %sqrt1, float *%ptr1
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store volatile float %sqrt2, float *%ptr2
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ret void
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}
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; No variant of FP operations can be scheduled across a SPFC.
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define void @f7(float %f1, float %f2, float *%ptr1, float *%ptr2) {
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; CHECK-LABEL: f7:
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; CHECK: sqebr
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.sqrt.f32(float %f1)
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%sqrt2 = call float @llvm.sqrt.f32(float %f2)
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call void @llvm.s390.sfpc(i32 0)
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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define void @f8(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f8:
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; CHECK: sqebr
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.ignore") #0
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call void @llvm.s390.sfpc(i32 0) #0
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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define void @f9(float %f1, float %f2, float *%ptr1, float *%ptr2) #0 {
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; CHECK-LABEL: f9:
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; CHECK: sqebr
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; CHECK: sqebr
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; CHECK: ste
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; CHECK: ste
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; CHECK: br %r14
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%sqrt1 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f1,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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%sqrt2 = call float @llvm.experimental.constrained.sqrt.f32(
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float %f2,
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metadata !"round.dynamic",
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metadata !"fpexcept.strict") #0
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call void @llvm.s390.sfpc(i32 0) #0
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store float %sqrt1, float *%ptr1
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store float %sqrt2, float *%ptr2
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ret void
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}
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attributes #0 = { strictfp }
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