232 lines
7.6 KiB
LLVM
232 lines
7.6 KiB
LLVM
; RUN: opt -mtriple=x86_64-unknown-linux-gnu < %s -instcombine -S | FileCheck %s
|
|
|
|
; Make sure libcalls are replaced with intrinsic calls.
|
|
|
|
declare float @llvm.fabs.f32(float)
|
|
declare double @llvm.fabs.f64(double)
|
|
declare fp128 @llvm.fabs.f128(fp128)
|
|
|
|
declare float @fabsf(float)
|
|
declare double @fabs(double)
|
|
declare fp128 @fabsl(fp128)
|
|
declare float @llvm.fma.f32(float, float, float)
|
|
declare float @llvm.fmuladd.f32(float, float, float)
|
|
|
|
define float @replace_fabs_call_f32(float %x) {
|
|
%fabsf = tail call float @fabsf(float %x)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @replace_fabs_call_f32(
|
|
; CHECK-NEXT: %fabsf = call float @llvm.fabs.f32(float %x)
|
|
; CHECK-NEXT: ret float %fabsf
|
|
}
|
|
|
|
define double @replace_fabs_call_f64(double %x) {
|
|
%fabs = tail call double @fabs(double %x)
|
|
ret double %fabs
|
|
|
|
; CHECK-LABEL: @replace_fabs_call_f64(
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %x)
|
|
; CHECK-NEXT: ret double %fabs
|
|
}
|
|
|
|
define fp128 @replace_fabs_call_f128(fp128 %x) {
|
|
%fabsl = tail call fp128 @fabsl(fp128 %x)
|
|
ret fp128 %fabsl
|
|
|
|
; CHECK-LABEL: replace_fabs_call_f128(
|
|
; CHECK-NEXT: %fabsl = call fp128 @llvm.fabs.f128(fp128 %x)
|
|
; CHECK-NEXT: ret fp128 %fabsl
|
|
}
|
|
|
|
; Make sure fast math flags are preserved when replacing the libcall.
|
|
define float @fmf_replace_fabs_call_f32(float %x) {
|
|
%fabsf = tail call nnan float @fabsf(float %x)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @fmf_replace_fabs_call_f32(
|
|
; CHECK-NEXT: %fabsf = call nnan float @llvm.fabs.f32(float %x)
|
|
; CHECK-NEXT: ret float %fabsf
|
|
}
|
|
|
|
; Make sure all intrinsic calls are eliminated when the input is known
|
|
; positive.
|
|
|
|
; The fabs cannot be eliminated because %x may be a NaN
|
|
define float @square_fabs_intrinsic_f32(float %x) {
|
|
%mul = fmul float %x, %x
|
|
%fabsf = tail call float @llvm.fabs.f32(float %mul)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: square_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %mul = fmul float %x, %x
|
|
; CHECK-NEXT: %fabsf = tail call float @llvm.fabs.f32(float %mul)
|
|
; CHECK-NEXT: ret float %fabsf
|
|
}
|
|
|
|
define double @square_fabs_intrinsic_f64(double %x) {
|
|
%mul = fmul double %x, %x
|
|
%fabs = tail call double @llvm.fabs.f64(double %mul)
|
|
ret double %fabs
|
|
|
|
; CHECK-LABEL: square_fabs_intrinsic_f64(
|
|
; CHECK-NEXT: %mul = fmul double %x, %x
|
|
; CHECK-NEXT: %fabs = tail call double @llvm.fabs.f64(double %mul)
|
|
; CHECK-NEXT: ret double %fabs
|
|
}
|
|
|
|
define fp128 @square_fabs_intrinsic_f128(fp128 %x) {
|
|
%mul = fmul fp128 %x, %x
|
|
%fabsl = tail call fp128 @llvm.fabs.f128(fp128 %mul)
|
|
ret fp128 %fabsl
|
|
|
|
; CHECK-LABEL: square_fabs_intrinsic_f128(
|
|
; CHECK-NEXT: %mul = fmul fp128 %x, %x
|
|
; CHECK-NEXT: %fabsl = tail call fp128 @llvm.fabs.f128(fp128 %mul)
|
|
; CHECK-NEXT: ret fp128 %fabsl
|
|
}
|
|
|
|
define float @square_nnan_fabs_intrinsic_f32(float %x) {
|
|
%mul = fmul nnan float %x, %x
|
|
%fabsf = call float @llvm.fabs.f32(float %mul)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: square_nnan_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %mul = fmul nnan float %x, %x
|
|
; CHECK-NEXT: ret float %mul
|
|
}
|
|
|
|
; Shrinking a library call to a smaller type should not be inhibited by nor inhibit the square optimization.
|
|
|
|
define float @square_fabs_shrink_call1(float %x) {
|
|
%ext = fpext float %x to double
|
|
%sq = fmul double %ext, %ext
|
|
%fabs = call double @fabs(double %sq)
|
|
%trunc = fptrunc double %fabs to float
|
|
ret float %trunc
|
|
|
|
; CHECK-LABEL: square_fabs_shrink_call1(
|
|
; CHECK-NEXT: fmul float %x, %x
|
|
; CHECK-NEXT: %trunc = call float @llvm.fabs.f32(float
|
|
; CHECK-NEXT: ret float %trunc
|
|
}
|
|
|
|
define float @square_fabs_shrink_call2(float %x) {
|
|
%sq = fmul float %x, %x
|
|
%ext = fpext float %sq to double
|
|
%fabs = call double @fabs(double %ext)
|
|
%trunc = fptrunc double %fabs to float
|
|
ret float %trunc
|
|
|
|
; CHECK-LABEL: square_fabs_shrink_call2(
|
|
; CHECK-NEXT: %sq = fmul float %x, %x
|
|
; CHECK-NEXT: %trunc = call float @llvm.fabs.f32(float %sq)
|
|
; CHECK-NEXT: ret float %trunc
|
|
}
|
|
|
|
; CHECK-LABEL: @fabs_select_constant_negative_positive(
|
|
; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00
|
|
; CHECK-NEXT: ret float %fabs
|
|
define float @fabs_select_constant_negative_positive(i32 %c) {
|
|
%cmp = icmp eq i32 %c, 0
|
|
%select = select i1 %cmp, float -1.0, float 2.0
|
|
%fabs = call float @llvm.fabs.f32(float %select)
|
|
ret float %fabs
|
|
}
|
|
|
|
; CHECK-LABEL: @fabs_select_constant_positive_negative(
|
|
; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00
|
|
; CHECK-NEXT: ret float %fabs
|
|
define float @fabs_select_constant_positive_negative(i32 %c) {
|
|
%cmp = icmp eq i32 %c, 0
|
|
%select = select i1 %cmp, float 1.0, float -2.0
|
|
%fabs = call float @llvm.fabs.f32(float %select)
|
|
ret float %fabs
|
|
}
|
|
|
|
; CHECK-LABEL: @fabs_select_constant_negative_negative(
|
|
; CHECK: %fabs = select i1 %cmp, float 1.000000e+00, float 2.000000e+00
|
|
; CHECK-NEXT: ret float %fabs
|
|
define float @fabs_select_constant_negative_negative(i32 %c) {
|
|
%cmp = icmp eq i32 %c, 0
|
|
%select = select i1 %cmp, float -1.0, float -2.0
|
|
%fabs = call float @llvm.fabs.f32(float %select)
|
|
ret float %fabs
|
|
}
|
|
|
|
; CHECK-LABEL: @fabs_select_constant_neg0(
|
|
; CHECK-NEXT: ret float 0.0
|
|
define float @fabs_select_constant_neg0(i32 %c) {
|
|
%cmp = icmp eq i32 %c, 0
|
|
%select = select i1 %cmp, float -0.0, float 0.0
|
|
%fabs = call float @llvm.fabs.f32(float %select)
|
|
ret float %fabs
|
|
}
|
|
|
|
; CHECK-LABEL: @fabs_select_var_constant_negative(
|
|
; CHECK: %select = select i1 %cmp, float %x, float -1.000000e+00
|
|
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
|
|
define float @fabs_select_var_constant_negative(i32 %c, float %x) {
|
|
%cmp = icmp eq i32 %c, 0
|
|
%select = select i1 %cmp, float %x, float -1.0
|
|
%fabs = call float @llvm.fabs.f32(float %select)
|
|
ret float %fabs
|
|
}
|
|
|
|
; The fabs cannot be eliminated because %x may be a NaN
|
|
define float @square_fma_fabs_intrinsic_f32(float %x) {
|
|
%fma = call float @llvm.fma.f32(float %x, float %x, float 1.0)
|
|
%fabsf = call float @llvm.fabs.f32(float %fma)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @square_fma_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %fma = call float @llvm.fma.f32(float %x, float %x, float 1.000000e+00)
|
|
; CHECK-NEXT: %fabsf = call float @llvm.fabs.f32(float %fma)
|
|
; CHECK-NEXT: ret float %fabsf
|
|
}
|
|
|
|
; The fabs cannot be eliminated because %x may be a NaN
|
|
define float @square_nnan_fma_fabs_intrinsic_f32(float %x) {
|
|
%fma = call nnan float @llvm.fma.f32(float %x, float %x, float 1.0)
|
|
%fabsf = call float @llvm.fabs.f32(float %fma)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @square_nnan_fma_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %fma = call nnan float @llvm.fma.f32(float %x, float %x, float 1.000000e+00)
|
|
; CHECK-NEXT: ret float %fma
|
|
}
|
|
|
|
define float @square_fmuladd_fabs_intrinsic_f32(float %x) {
|
|
%fmuladd = call float @llvm.fmuladd.f32(float %x, float %x, float 1.0)
|
|
%fabsf = call float @llvm.fabs.f32(float %fmuladd)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @square_fmuladd_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %fmuladd = call float @llvm.fmuladd.f32(float %x, float %x, float 1.000000e+00)
|
|
; CHECK-NEXT: %fabsf = call float @llvm.fabs.f32(float %fmuladd)
|
|
; CHECK-NEXT: ret float %fabsf
|
|
}
|
|
|
|
define float @square_nnan_fmuladd_fabs_intrinsic_f32(float %x) {
|
|
%fmuladd = call nnan float @llvm.fmuladd.f32(float %x, float %x, float 1.0)
|
|
%fabsf = call float @llvm.fabs.f32(float %fmuladd)
|
|
ret float %fabsf
|
|
|
|
; CHECK-LABEL: @square_nnan_fmuladd_fabs_intrinsic_f32(
|
|
; CHECK-NEXT: %fmuladd = call nnan float @llvm.fmuladd.f32(float %x, float %x, float 1.000000e+00)
|
|
; CHECK-NEXT: ret float %fmuladd
|
|
}
|
|
|
|
; Don't introduce a second fpext
|
|
; CHECK-LABEL: @multi_use_fabs_fpext(
|
|
; CHECK: %fpext = fpext float %x to double
|
|
; CHECK-NEXT: %fabs = call double @llvm.fabs.f64(double %fpext)
|
|
; CHECK-NEXT: store volatile double %fpext, double* undef, align 8
|
|
; CHECK-NEXT: ret double %fabs
|
|
define double @multi_use_fabs_fpext(float %x) {
|
|
%fpext = fpext float %x to double
|
|
%fabs = call double @llvm.fabs.f64(double %fpext)
|
|
store volatile double %fpext, double* undef
|
|
ret double %fabs
|
|
}
|