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2aeb81a126
Summary: The LibCallSimplifier will turn llvm.exp2.* intrinsics into ldexp* libcalls which do not make sense with the AMDGPU backend. In the long run, we'll want an llvm.ldexp.* intrinsic to properly make use of this optimization, but this works around the problem for now. See also: http://reviews.llvm.org/D14327 (suggested llvm.ldexp.* implementation) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92709 Reviewers: arsenm, tstellarAMD Differential Revision: http://reviews.llvm.org/D14990 llvm-svn: 255658
100 lines
2.9 KiB
LLVM
100 lines
2.9 KiB
LLVM
; Test that the exp2 library call simplifier works correctly.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=CHECK -check-prefix=INTRINSIC -check-prefix=LDEXP -check-prefix=LDEXPF
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; RUN: opt < %s -instcombine -S -mtriple=i386-pc-win32 | FileCheck %s -check-prefix=INTRINSIC -check-prefix=LDEXP -check-prefix=NOLDEXPF
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; RUN: opt < %s -instcombine -S -mtriple=amdgcn-unknown-unknown | FileCheck %s -check-prefix=INTRINSIC -check-prefix=NOLDEXP -check-prefix=NOLDEXPF
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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declare double @exp2(double)
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declare float @exp2f(float)
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; Check exp2(sitofp(x)) -> ldexp(1.0, sext(x)).
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define double @test_simplify1(i32 %x) {
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; CHECK-LABEL: @test_simplify1(
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%conv = sitofp i32 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @ldexp
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ret double %ret
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}
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define double @test_simplify2(i16 signext %x) {
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; CHECK-LABEL: @test_simplify2(
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%conv = sitofp i16 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @ldexp
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ret double %ret
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}
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define double @test_simplify3(i8 signext %x) {
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; CHECK-LABEL: @test_simplify3(
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%conv = sitofp i8 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @ldexp
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ret double %ret
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}
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define float @test_simplify4(i32 %x) {
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; CHECK-LABEL: @test_simplify4(
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%conv = sitofp i32 %x to float
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%ret = call float @exp2f(float %conv)
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; CHECK: call float @ldexpf
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ret float %ret
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}
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; Check exp2(uitofp(x)) -> ldexp(1.0, zext(x)).
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define double @test_no_simplify1(i32 %x) {
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; CHECK-LABEL: @test_no_simplify1(
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%conv = uitofp i32 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @exp2
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ret double %ret
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}
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define double @test_simplify6(i16 zeroext %x) {
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; CHECK-LABEL: @test_simplify6(
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%conv = uitofp i16 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @ldexp
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ret double %ret
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}
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define double @test_simplify7(i8 zeroext %x) {
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; CHECK-LABEL: @test_simplify7(
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%conv = uitofp i8 %x to double
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%ret = call double @exp2(double %conv)
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; CHECK: call double @ldexp
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ret double %ret
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}
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define float @test_simplify8(i8 zeroext %x) {
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; CHECK-LABEL: @test_simplify8(
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%conv = uitofp i8 %x to float
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%ret = call float @exp2f(float %conv)
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; CHECK: call float @ldexpf
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ret float %ret
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}
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declare double @llvm.exp2.f64(double)
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declare float @llvm.exp2.f32(float)
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define double @test_simplify9(i8 zeroext %x) {
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; INTRINSIC-LABEL: @test_simplify9(
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%conv = uitofp i8 %x to double
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%ret = call double @llvm.exp2.f64(double %conv)
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; LDEXP: call double @ldexp
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; NOLDEXP-NOT: call double @ldexp
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ret double %ret
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}
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define float @test_simplify10(i8 zeroext %x) {
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; INTRINSIC-LABEL: @test_simplify10(
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%conv = uitofp i8 %x to float
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%ret = call float @llvm.exp2.f32(float %conv)
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; LDEXPF: call float @ldexpf
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; NOLDEXPF-NOT: call float @ldexpf
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ret float %ret
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}
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