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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; fsub -0.0, (fsub -0.0, X) ==> X
define float @fsub_-0_-0_x(float %a) {
; CHECK-LABEL: @fsub_-0_-0_x(
; CHECK-NEXT: ret float %a
;
%t1 = fsub float -0.0, %a
%ret = fsub float -0.0, %t1
ret float %ret
}
; fsub 0.0, (fsub -0.0, X) != X
define float @fsub_0_-0_x(float %a) {
; CHECK-LABEL: @fsub_0_-0_x(
; CHECK-NEXT: [[T1:%.*]] = fsub float 0.000000e+00, %a
; CHECK-NEXT: [[RET:%.*]] = fsub float -0.000000e+00, [[T1]]
; CHECK-NEXT: ret float [[RET]]
;
%t1 = fsub float 0.0, %a
%ret = fsub float -0.0, %t1
ret float %ret
}
; fsub -0.0, (fsub 0.0, X) != X
define float @fsub_-0_0_x(float %a) {
; CHECK-LABEL: @fsub_-0_0_x(
; CHECK-NEXT: [[T1:%.*]] = fsub float -0.000000e+00, %a
; CHECK-NEXT: [[RET:%.*]] = fsub float 0.000000e+00, [[T1]]
; CHECK-NEXT: ret float [[RET]]
;
%t1 = fsub float -0.0, %a
%ret = fsub float 0.0, %t1
ret float %ret
}
; fsub X, 0 ==> X
define float @fsub_x_0(float %a) {
; CHECK-LABEL: @fsub_x_0(
; CHECK-NEXT: ret float %a
;
%ret = fsub float %a, 0.0
ret float %ret
}
; fadd X, -0 ==> X
define float @fadd_x_n0(float %a) {
; CHECK-LABEL: @fadd_x_n0(
; CHECK-NEXT: ret float %a
;
%ret = fadd float %a, -0.0
ret float %ret
}
; fmul X, 1.0 ==> X
define double @fmul_X_1(double %a) {
; CHECK-LABEL: @fmul_X_1(
; CHECK-NEXT: ret double %a
;
%b = fmul double 1.000000e+00, %a
ret double %b
}
; fdiv X, 1.0 ==> X
define float @fdiv_x_1(float %a) {
; CHECK-LABEL: @fdiv_x_1(
; CHECK-NEXT: ret float %a
;
%ret = fdiv float %a, 1.0
ret float %ret
}
; We can't optimize away the fadd in this test because the input
; value to the function and subsequently to the fadd may be -0.0.
; In that one special case, the result of the fadd should be +0.0
; rather than the first parameter of the fadd.
; Fragile test warning: We need 6 sqrt calls to trigger the bug
; because the internal logic has a magic recursion limit of 6.
; This is presented without any explanation or ability to customize.
declare float @sqrtf(float)
define float @PR22688(float %x) {
; CHECK-LABEL: @PR22688(
; CHECK-NEXT: [[TMP1:%.*]] = call float @sqrtf(float %x)
; CHECK-NEXT: [[TMP2:%.*]] = call float @sqrtf(float [[TMP1]])
; CHECK-NEXT: [[TMP3:%.*]] = call float @sqrtf(float [[TMP2]])
; CHECK-NEXT: [[TMP4:%.*]] = call float @sqrtf(float [[TMP3]])
; CHECK-NEXT: [[TMP5:%.*]] = call float @sqrtf(float [[TMP4]])
; CHECK-NEXT: [[TMP6:%.*]] = call float @sqrtf(float [[TMP5]])
; CHECK-NEXT: [[TMP7:%.*]] = fadd float [[TMP6]], 0.000000e+00
; CHECK-NEXT: ret float [[TMP7]]
;
%1 = call float @sqrtf(float %x)
%2 = call float @sqrtf(float %1)
%3 = call float @sqrtf(float %2)
%4 = call float @sqrtf(float %3)
%5 = call float @sqrtf(float %4)
%6 = call float @sqrtf(float %5)
%7 = fadd float %6, 0.0
ret float %7
}
declare float @llvm.fabs.f32(float)
; CHECK-LABEL: @fabs_select_positive_constants(
; CHECK: %select = select i1 %cmp, float 1.000000e+00, float 2.000000e+00
; CHECK-NEXT: ret float %select
define float @fabs_select_positive_constants(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_variable(
; CHECK: %select = select i1 %cmp, float 1.000000e+00, float %x
; CHECK-NEXT: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_constant_variable(i32 %c, float %x) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 1.0, float %x
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_neg0_pos0(
; CHECK: %select = select i1 %cmp, float -0.000000e+00, float 0.000000e+00
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
; CHECK-NEXT: ret float %fabs
define float @fabs_select_neg0_pos0(float addrspace(1)* %out, 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_neg0_neg1(
; CHECK: %select = select i1 %cmp, float -0.000000e+00, float -1.000000e+00
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_neg0_neg1(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float -0.0, float -1.0
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_nan_nan(
; CHECK: %select = select i1 %cmp, float 0x7FF8000000000000, float 0x7FF8000100000000
; CHECK-NEXT: ret float %select
define float @fabs_select_nan_nan(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 0x7FF8000000000000, float 0x7FF8000100000000
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_negnan_nan(
; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000000000000
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_negnan_nan(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000000000000
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_negnan_negnan(
; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000100000000
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_negnan_negnan(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 0xFFF8000000000000, float 0x7FF8000100000000
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_negnan_negzero(
; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float -0.000000e+00
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_negnan_negzero(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 0xFFF8000000000000, float -0.0
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
; CHECK-LABEL: @fabs_select_negnan_zero(
; CHECK: %select = select i1 %cmp, float 0xFFF8000000000000, float 0.000000e+00
; CHECK: %fabs = call float @llvm.fabs.f32(float %select)
define float @fabs_select_negnan_zero(float addrspace(1)* %out, i32 %c) {
%cmp = icmp eq i32 %c, 0
%select = select i1 %cmp, float 0xFFF8000000000000, float 0.0
%fabs = call float @llvm.fabs.f32(float %select)
ret float %fabs
}
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