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c7495a0fca
Add a mapping from register-based <INSN>R instructions to the corresponding memory-based <INSN>. Use it to cut down on the number of spill loads. Some instructions extend their operands from smaller fields, so this required a new TSFlags field to say how big the unextended operand is. This optimisation doesn't trigger for C(G)R and CL(G)R because in practice we always combine those instructions with a branch. Adding a test for every other case probably seems excessive, but it did catch a missed optimisation for DSGF (fixed in r185435). llvm-svn: 185529
155 lines
4.9 KiB
LLVM
155 lines
4.9 KiB
LLVM
; Test 32-bit square root.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare float @llvm.sqrt.f32(float %f)
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; Check register square root.
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define float @f1(float %val) {
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; CHECK: f1:
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; CHECK: sqebr %f0, %f0
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; CHECK: br %r14
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Check the low end of the SQEB range.
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define float @f2(float *%ptr) {
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; CHECK: f2:
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; CHECK: sqeb %f0, 0(%r2)
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; CHECK: br %r14
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%val = load float *%ptr
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Check the high end of the aligned SQEB range.
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define float @f3(float *%base) {
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; CHECK: f3:
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; CHECK: sqeb %f0, 4092(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 1023
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%val = load float *%ptr
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define float @f4(float *%base) {
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; CHECK: f4:
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; CHECK: aghi %r2, 4096
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; CHECK: sqeb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 1024
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%val = load float *%ptr
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Check negative displacements, which also need separate address logic.
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define float @f5(float *%base) {
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; CHECK: f5:
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; CHECK: aghi %r2, -4
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; CHECK: sqeb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 -1
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%val = load float *%ptr
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Check that SQEB allows indices.
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define float @f6(float *%base, i64 %index) {
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; CHECK: f6:
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; CHECK: sllg %r1, %r3, 2
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; CHECK: sqeb %f0, 400(%r1,%r2)
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; CHECK: br %r14
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%ptr1 = getelementptr float *%base, i64 %index
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%ptr2 = getelementptr float *%ptr1, i64 100
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%val = load float *%ptr2
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%res = call float @llvm.sqrt.f32(float %val)
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ret float %res
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}
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; Test a case where we spill the source of at least one SQEBR. We want
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; to use SQEB if possible.
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define void @f7(float *%ptr) {
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; CHECK: f7:
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; CHECK: sqeb {{%f[0-9]+}}, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%val0 = load volatile float *%ptr
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%val1 = load volatile float *%ptr
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%val2 = load volatile float *%ptr
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%val3 = load volatile float *%ptr
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%val4 = load volatile float *%ptr
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%val5 = load volatile float *%ptr
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%val6 = load volatile float *%ptr
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%val7 = load volatile float *%ptr
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%val8 = load volatile float *%ptr
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%val9 = load volatile float *%ptr
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%val10 = load volatile float *%ptr
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%val11 = load volatile float *%ptr
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%val12 = load volatile float *%ptr
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%val13 = load volatile float *%ptr
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%val14 = load volatile float *%ptr
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%val15 = load volatile float *%ptr
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%val16 = load volatile float *%ptr
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%sqrt0 = call float @llvm.sqrt.f32(float %val0)
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%sqrt1 = call float @llvm.sqrt.f32(float %val1)
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%sqrt2 = call float @llvm.sqrt.f32(float %val2)
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%sqrt3 = call float @llvm.sqrt.f32(float %val3)
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%sqrt4 = call float @llvm.sqrt.f32(float %val4)
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%sqrt5 = call float @llvm.sqrt.f32(float %val5)
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%sqrt6 = call float @llvm.sqrt.f32(float %val6)
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%sqrt7 = call float @llvm.sqrt.f32(float %val7)
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%sqrt8 = call float @llvm.sqrt.f32(float %val8)
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%sqrt9 = call float @llvm.sqrt.f32(float %val9)
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%sqrt10 = call float @llvm.sqrt.f32(float %val10)
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%sqrt11 = call float @llvm.sqrt.f32(float %val11)
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%sqrt12 = call float @llvm.sqrt.f32(float %val12)
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%sqrt13 = call float @llvm.sqrt.f32(float %val13)
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%sqrt14 = call float @llvm.sqrt.f32(float %val14)
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%sqrt15 = call float @llvm.sqrt.f32(float %val15)
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%sqrt16 = call float @llvm.sqrt.f32(float %val16)
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store volatile float %val0, float *%ptr
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store volatile float %val1, float *%ptr
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store volatile float %val2, float *%ptr
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store volatile float %val3, float *%ptr
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store volatile float %val4, float *%ptr
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store volatile float %val5, float *%ptr
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store volatile float %val6, float *%ptr
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store volatile float %val7, float *%ptr
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store volatile float %val8, float *%ptr
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store volatile float %val9, float *%ptr
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store volatile float %val10, float *%ptr
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store volatile float %val11, float *%ptr
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store volatile float %val12, float *%ptr
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store volatile float %val13, float *%ptr
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store volatile float %val14, float *%ptr
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store volatile float %val15, float *%ptr
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store volatile float %val16, float *%ptr
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store volatile float %sqrt0, float *%ptr
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store volatile float %sqrt1, float *%ptr
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store volatile float %sqrt2, float *%ptr
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store volatile float %sqrt3, float *%ptr
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store volatile float %sqrt4, float *%ptr
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store volatile float %sqrt5, float *%ptr
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store volatile float %sqrt6, float *%ptr
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store volatile float %sqrt7, float *%ptr
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store volatile float %sqrt8, float *%ptr
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store volatile float %sqrt9, float *%ptr
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store volatile float %sqrt10, float *%ptr
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store volatile float %sqrt11, float *%ptr
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store volatile float %sqrt12, float *%ptr
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store volatile float %sqrt13, float *%ptr
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store volatile float %sqrt14, float *%ptr
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store volatile float %sqrt15, float *%ptr
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store volatile float %sqrt16, float *%ptr
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ret void
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}
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