2016-12-09 04:23:56 +08:00
|
|
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
; RUN: opt < %s -instsimplify -S | FileCheck %s
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|
|
|
|
2016-02-29 19:12:23 +08:00
|
|
|
; fsub -0.0, (fsub -0.0, X) ==> X
|
|
|
|
define float @fsub_-0_-0_x(float %a) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fsub_-0_-0_x(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: ret float [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
;
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
%t1 = fsub float -0.0, %a
|
|
|
|
%ret = fsub float -0.0, %t1
|
|
|
|
ret float %ret
|
|
|
|
}
|
|
|
|
|
2016-02-29 19:12:23 +08:00
|
|
|
; fsub 0.0, (fsub -0.0, X) != X
|
|
|
|
define float @fsub_0_-0_x(float %a) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fsub_0_-0_x(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: [[T1:%.*]] = fsub float 0.000000e+00, [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-NEXT: [[RET:%.*]] = fsub float -0.000000e+00, [[T1]]
|
|
|
|
; CHECK-NEXT: ret float [[RET]]
|
|
|
|
;
|
2016-02-29 19:12:23 +08:00
|
|
|
%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) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fsub_-0_0_x(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: [[T1:%.*]] = fsub float -0.000000e+00, [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-NEXT: [[RET:%.*]] = fsub float 0.000000e+00, [[T1]]
|
|
|
|
; CHECK-NEXT: ret float [[RET]]
|
|
|
|
;
|
2016-02-29 19:12:23 +08:00
|
|
|
%t1 = fsub float -0.0, %a
|
|
|
|
%ret = fsub float 0.0, %t1
|
|
|
|
ret float %ret
|
|
|
|
}
|
|
|
|
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
; fsub X, 0 ==> X
|
|
|
|
define float @fsub_x_0(float %a) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fsub_x_0(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: ret float [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
;
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
%ret = fsub float %a, 0.0
|
|
|
|
ret float %ret
|
|
|
|
}
|
|
|
|
|
|
|
|
; fadd X, -0 ==> X
|
|
|
|
define float @fadd_x_n0(float %a) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fadd_x_n0(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: ret float [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
;
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
%ret = fadd float %a, -0.0
|
|
|
|
ret float %ret
|
|
|
|
}
|
|
|
|
|
|
|
|
; fmul X, 1.0 ==> X
|
|
|
|
define double @fmul_X_1(double %a) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @fmul_X_1(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: ret double [[A:%.*]]
|
2016-03-26 04:12:25 +08:00
|
|
|
;
|
2018-02-14 02:22:53 +08:00
|
|
|
%b = fmul double 1.0, %a
|
Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.
fsub X, +0 ==> X
fsub X, -0 ==> X, when we know X is not -0
fsub +/-0.0, (fsub -0.0, X) ==> X
fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
fsub nnan ninf X, X ==> 0.0
fadd nsz X, 0 ==> X
fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
where nnan and ninf have to occur at least once somewhere in this expression
fmul X, 1.0 ==> X
llvm-svn: 169940
2012-12-12 08:27:46 +08:00
|
|
|
ret double %b
|
|
|
|
}
|
2015-02-26 02:00:15 +08:00
|
|
|
|
2018-02-14 02:22:53 +08:00
|
|
|
; PR2642
|
|
|
|
define <4 x float> @fmul_X_1_vec(<4 x float> %x) {
|
|
|
|
; CHECK-LABEL: @fmul_X_1_vec(
|
|
|
|
; CHECK-NEXT: ret <4 x float> [[X:%.*]]
|
|
|
|
;
|
|
|
|
%m = fmul <4 x float> %x, <float 1.0, float 1.0, float 1.0, float 1.0>
|
|
|
|
ret <4 x float> %m
|
|
|
|
}
|
|
|
|
|
2016-12-09 04:23:56 +08:00
|
|
|
; fdiv X, 1.0 ==> X
|
|
|
|
define float @fdiv_x_1(float %a) {
|
|
|
|
; CHECK-LABEL: @fdiv_x_1(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: ret float [[A:%.*]]
|
2016-12-09 04:23:56 +08:00
|
|
|
;
|
|
|
|
%ret = fdiv float %a, 1.0
|
|
|
|
ret float %ret
|
|
|
|
}
|
|
|
|
|
2015-02-26 02:00:15 +08:00
|
|
|
; We can't optimize away the fadd in this test because the input
|
2016-03-26 04:12:25 +08:00
|
|
|
; value to the function and subsequently to the fadd may be -0.0.
|
2015-02-26 02:00:15 +08:00
|
|
|
; In that one special case, the result of the fadd should be +0.0
|
|
|
|
; rather than the first parameter of the fadd.
|
|
|
|
|
2016-03-26 04:12:25 +08:00
|
|
|
; Fragile test warning: We need 6 sqrt calls to trigger the bug
|
|
|
|
; because the internal logic has a magic recursion limit of 6.
|
2015-02-26 02:00:15 +08:00
|
|
|
; This is presented without any explanation or ability to customize.
|
|
|
|
|
|
|
|
declare float @sqrtf(float)
|
|
|
|
|
|
|
|
define float @PR22688(float %x) {
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-LABEL: @PR22688(
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-NEXT: [[TMP1:%.*]] = call float @sqrtf(float [[X:%.*]])
|
2016-12-09 04:23:56 +08:00
|
|
|
; 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
|
2016-03-26 04:12:25 +08:00
|
|
|
; CHECK-NEXT: ret float [[TMP7]]
|
|
|
|
;
|
2015-02-26 02:00:15 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
2017-01-11 08:33:24 +08:00
|
|
|
declare float @llvm.fabs.f32(float)
|
2017-01-26 08:10:26 +08:00
|
|
|
declare float @llvm.sqrt.f32(float)
|
2017-01-11 08:33:24 +08:00
|
|
|
|
|
|
|
define float @fabs_select_positive_constants(i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_positive_constants(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 1.000000e+00, float 2.000000e+00
|
|
|
|
; CHECK-NEXT: ret float [[SELECT]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_constant_variable(i32 %c, float %x) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_constant_variable(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 1.000000e+00, float [[X:%.*]]
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_neg0_pos0(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_neg0_pos0(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float -0.000000e+00, float 0.000000e+00
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_neg0_neg1(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_neg0_neg1(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float -0.000000e+00, float -1.000000e+00
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_nan_nan(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_nan_nan(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 0x7FF8000000000000, float 0x7FF8000100000000
|
|
|
|
; CHECK-NEXT: ret float [[SELECT]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_negnan_nan(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_negnan_nan(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 0xFFF8000000000000, float 0x7FF8000000000000
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_negnan_negnan(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_negnan_negnan(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 0xFFF8000000000000, float 0x7FF8000100000000
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_negnan_negzero(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_negnan_negzero(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 0xFFF8000000000000, float -0.000000e+00
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
|
|
|
%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
|
|
|
|
}
|
|
|
|
|
|
|
|
define float @fabs_select_negnan_zero(float addrspace(1)* %out, i32 %c) {
|
2018-02-14 02:22:53 +08:00
|
|
|
; CHECK-LABEL: @fabs_select_negnan_zero(
|
|
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[C:%.*]], 0
|
|
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select i1 [[CMP]], float 0xFFF8000000000000, float 0.000000e+00
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SELECT]])
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|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-11 08:33:24 +08:00
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|
|
%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
|
|
|
|
}
|
2017-01-26 08:10:26 +08:00
|
|
|
|
|
|
|
; The fabs can't be eliminated because llvm.sqrt.f32 may return -0 or NaN with
|
|
|
|
; an arbitrary sign bit.
|
2018-02-14 02:22:53 +08:00
|
|
|
define float @fabs_sqrt(float %a) {
|
|
|
|
; CHECK-LABEL: @fabs_sqrt(
|
|
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call float @llvm.sqrt.f32(float [[A:%.*]])
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-26 08:10:26 +08:00
|
|
|
%sqrt = call float @llvm.sqrt.f32(float %a)
|
|
|
|
%fabs = call float @llvm.fabs.f32(float %sqrt)
|
|
|
|
ret float %fabs
|
|
|
|
}
|
|
|
|
|
|
|
|
; The fabs can't be eliminated because the nnan sqrt may still return -0.
|
2018-02-14 02:22:53 +08:00
|
|
|
define float @fabs_sqrt_nnan(float %a) {
|
|
|
|
; CHECK-LABEL: @fabs_sqrt_nnan(
|
|
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call nnan float @llvm.sqrt.f32(float [[A:%.*]])
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-26 08:10:26 +08:00
|
|
|
%sqrt = call nnan float @llvm.sqrt.f32(float %a)
|
|
|
|
%fabs = call float @llvm.fabs.f32(float %sqrt)
|
|
|
|
ret float %fabs
|
|
|
|
}
|
|
|
|
|
|
|
|
; The fabs can't be eliminated because the nsz sqrt may still return NaN.
|
2018-02-14 02:22:53 +08:00
|
|
|
define float @fabs_sqrt_nsz(float %a) {
|
|
|
|
; CHECK-LABEL: @fabs_sqrt_nsz(
|
|
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call nsz float @llvm.sqrt.f32(float [[A:%.*]])
|
|
|
|
; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[SQRT]])
|
|
|
|
; CHECK-NEXT: ret float [[FABS]]
|
|
|
|
;
|
2017-01-26 08:10:26 +08:00
|
|
|
%sqrt = call nsz float @llvm.sqrt.f32(float %a)
|
|
|
|
%fabs = call float @llvm.fabs.f32(float %sqrt)
|
|
|
|
ret float %fabs
|
|
|
|
}
|
|
|
|
|
|
|
|
; The fabs can be eliminated because we're nsz and nnan.
|
2018-02-14 02:22:53 +08:00
|
|
|
define float @fabs_sqrt_nnan_nsz(float %a) {
|
|
|
|
; CHECK-LABEL: @fabs_sqrt_nnan_nsz(
|
|
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call nnan nsz float @llvm.sqrt.f32(float [[A:%.*]])
|
|
|
|
; CHECK-NEXT: ret float [[SQRT]]
|
|
|
|
;
|
2017-01-26 08:10:26 +08:00
|
|
|
%sqrt = call nnan nsz float @llvm.sqrt.f32(float %a)
|
|
|
|
%fabs = call float @llvm.fabs.f32(float %sqrt)
|
|
|
|
ret float %fabs
|
|
|
|
}
|
|
|
|
|
|
|
|
; The second fabs can be eliminated because the operand to sqrt cannot be -0.
|
2018-02-14 02:22:53 +08:00
|
|
|
define float @fabs_sqrt_nnan_fabs(float %a) {
|
|
|
|
; CHECK-LABEL: @fabs_sqrt_nnan_fabs(
|
|
|
|
; CHECK-NEXT: [[B:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
|
|
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call nnan float @llvm.sqrt.f32(float [[B]])
|
|
|
|
; CHECK-NEXT: ret float [[SQRT]]
|
|
|
|
;
|
2017-01-26 08:10:26 +08:00
|
|
|
%b = call float @llvm.fabs.f32(float %a)
|
|
|
|
%sqrt = call nnan float @llvm.sqrt.f32(float %b)
|
|
|
|
%fabs = call float @llvm.fabs.f32(float %sqrt)
|
|
|
|
ret float %fabs
|
|
|
|
}
|