xref: /llvm-project/llvm/test/Transforms/InstCombine/AMDGPU/fmul_legacy.ll (revision 1bce1beac4b7980ed01c07d6a6d789f8ec55adac)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -mtriple=amdgcn-amd-amdhsa -passes=instcombine -S | FileCheck %s
3
4; Simplify to +0.0.
5define float @test_zero(float %x) {
6; CHECK-LABEL: @test_zero(
7; CHECK-NEXT:    ret float 0.000000e+00
8;
9  %call = call float @llvm.amdgcn.fmul.legacy(float %x, float 0.0)
10  ret float %call
11}
12
13; Simplify to +0.0.
14define float @test_negzero(float %y) {
15; CHECK-LABEL: @test_negzero(
16; CHECK-NEXT:    ret float 0.000000e+00
17;
18  %call = call float @llvm.amdgcn.fmul.legacy(float -0.0, float %y)
19  ret float %call
20}
21
22; Combine to fmul because the constant is finite and non-zero.
23define float @test_const(float %x) {
24; CHECK-LABEL: @test_const(
25; CHECK-NEXT:    [[CALL:%.*]] = fmul float [[X:%.*]], 9.950000e+01
26; CHECK-NEXT:    ret float [[CALL]]
27;
28  %call = call float @llvm.amdgcn.fmul.legacy(float %x, float 99.5)
29  ret float %call
30}
31
32; Combine to fmul because the constant is finite and non-zero, preserving fmf.
33define float @test_const_fmf(float %x) {
34; CHECK-LABEL: @test_const_fmf(
35; CHECK-NEXT:    [[CALL:%.*]] = fmul contract float [[X:%.*]], 9.950000e+01
36; CHECK-NEXT:    ret float [[CALL]]
37;
38  %call = call contract float @llvm.amdgcn.fmul.legacy(float %x, float 99.5)
39  ret float %call
40}
41
42; Combine to fmul because neither argument can be infinity or NaN.
43define float @test_finite(i32 %x, i32 %y) {
44; CHECK-LABEL: @test_finite(
45; CHECK-NEXT:    [[XF:%.*]] = sitofp i32 [[X:%.*]] to float
46; CHECK-NEXT:    [[YF:%.*]] = sitofp i32 [[Y:%.*]] to float
47; CHECK-NEXT:    [[CALL:%.*]] = fmul float [[XF]], [[YF]]
48; CHECK-NEXT:    ret float [[CALL]]
49;
50  %xf = sitofp i32 %x to float
51  %yf = sitofp i32 %y to float
52  %call = call float @llvm.amdgcn.fmul.legacy(float %xf, float %yf)
53  ret float %call
54}
55
56; Combine to fmul because neither argument can be infinity or NaN based on assumptions
57define float @test_finite_assumed(float %x, float %y) {
58; CHECK-LABEL: @test_finite_assumed(
59; CHECK-NEXT:    [[FABS_X:%.*]] = call float @llvm.fabs.f32(float [[X:%.*]])
60; CHECK-NEXT:    [[IS_FINITE_X:%.*]] = fcmp one float [[FABS_X]], 0x7FF0000000000000
61; CHECK-NEXT:    [[FABS_Y:%.*]] = call float @llvm.fabs.f32(float [[Y:%.*]])
62; CHECK-NEXT:    [[IS_FINITE_Y:%.*]] = fcmp one float [[FABS_Y]], 0x7FF0000000000000
63; CHECK-NEXT:    call void @llvm.assume(i1 [[IS_FINITE_X]])
64; CHECK-NEXT:    call void @llvm.assume(i1 [[IS_FINITE_Y]])
65; CHECK-NEXT:    [[CALL:%.*]] = fmul float [[X]], [[Y]]
66; CHECK-NEXT:    ret float [[CALL]]
67;
68  %fabs.x = call float @llvm.fabs.f32(float %x)
69  %is.finite.x = fcmp one float %fabs.x, 0x7FF0000000000000
70  %fabs.y = call float @llvm.fabs.f32(float %y)
71  %is.finite.y = fcmp one float %fabs.y, 0x7FF0000000000000
72  call void @llvm.assume(i1 %is.finite.x)
73  call void @llvm.assume(i1 %is.finite.y)
74  %call = call float @llvm.amdgcn.fmul.legacy(float %x, float %y)
75  ret float %call
76}
77
78declare float @llvm.amdgcn.fmul.legacy(float, float)
79declare float @llvm.fabs.f32(float)
80declare void @llvm.assume(i1 noundef)
81