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https://github.com/c64scene-ar/llvm-6502.git
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a511846bdf
Summary: InstCombine infinite-loops for the testcase added It is because InstCombine is generating instructions that can be optimized by itself. Fix by not optimizing frem if the optimized type is the same as original type. rdar://problem/19150820 Reviewers: majnemer Differential Revision: http://reviews.llvm.org/D6634 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224097 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
2.2 KiB
LLVM
88 lines
2.2 KiB
LLVM
; Test some floating point casting cases
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i8 @test1() {
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%x = fptoui float 2.550000e+02 to i8 ; <i8> [#uses=1]
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ret i8 %x
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; CHECK: ret i8 -1
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}
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define i8 @test2() {
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%x = fptosi float -1.000000e+00 to i8 ; <i8> [#uses=1]
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ret i8 %x
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; CHECK: ret i8 -1
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}
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; CHECK: test3
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define half @test3(float %a) {
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; CHECK: fptrunc
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; CHECK: llvm.fabs.f16
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%b = call float @llvm.fabs.f32(float %a)
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%c = fptrunc float %b to half
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ret half %c
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}
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; CHECK: test4
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define half @test4(float %a) {
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; CHECK: fptrunc
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; CHECK: fsub
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%b = fsub float -0.0, %a
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%c = fptrunc float %b to half
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ret half %c
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}
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; CHECK: test4-fast
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define half @test4-fast(float %a) {
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; CHECK: fptrunc
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; CHECK: fsub fast
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%b = fsub fast float -0.0, %a
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%c = fptrunc float %b to half
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ret half %c
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}
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; CHECK: test5
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define half @test5(float %a, float %b, float %c) {
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; CHECK: fcmp ogt
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; CHECK: fptrunc
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; CHECK: select
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; CHECK: half 0xH3C00
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%d = fcmp ogt float %a, %b
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%e = select i1 %d, float %c, float 1.0
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%f = fptrunc float %e to half
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ret half %f
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}
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declare float @llvm.fabs.f32(float) nounwind readonly
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define <1 x float> @test6(<1 x double> %V) {
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%frem = frem <1 x double> %V, %V
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%trunc = fptrunc <1 x double> %frem to <1 x float>
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ret <1 x float> %trunc
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; CHECK-LABEL: @test6
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; CHECK-NEXT: %[[frem:.*]] = frem <1 x double> %V, %V
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; CHECK-NEXT: %[[trunc:.*]] = fptrunc <1 x double> %[[frem]] to <1 x float>
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; CHECK-NEXT: ret <1 x float> %trunc
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}
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define float @test7(double %V) {
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%frem = frem double %V, 1.000000e+00
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%trunc = fptrunc double %frem to float
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ret float %trunc
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; CHECK-LABEL: @test7
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; CHECK-NEXT: %[[frem:.*]] = frem double %V, 1.000000e+00
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; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float
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; CHECK-NEXT: ret float %trunc
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}
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define float @test8(float %V) {
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%fext = fpext float %V to double
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%frem = frem double %fext, 1.000000e-01
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%trunc = fptrunc double %frem to float
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ret float %trunc
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; CHECK-LABEL: @test8
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; CHECK-NEXT: %[[fext:.*]] = fpext float %V to double
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; CHECK-NEXT: %[[frem:.*]] = frem double %fext, 1.000000e-01
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; CHECK-NEXT: %[[trunc:.*]] = fptrunc double %frem to float
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; CHECK-NEXT: ret float %trunc
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}
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