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Fix a bug in implementation of Smith's algorithm used in complex div. (…
…#78330) This patch fixes a bug in Smith's algorithm (thanks to @andykaylor who detected it) and makes sure that last option in command line rules.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4 | ||
| // RUN: %clang_cc1 %s -O0 -emit-llvm -triple x86_64-unknown-unknown \ | ||
| // RUN: -complex-range=fortran -o - | FileCheck %s --check-prefix=FRTRN | ||
|
|
||
| // FRTRN-LABEL: define dso_local <2 x float> @div( | ||
| // FRTRN-SAME: <2 x float> noundef [[A_COERCE:%.*]], <2 x float> noundef [[B_COERCE:%.*]]) #[[ATTR0:[0-9]+]] { | ||
| // FRTRN-NEXT: entry: | ||
| // FRTRN-NEXT: [[RETVAL:%.*]] = alloca { float, float }, align 4 | ||
| // FRTRN-NEXT: [[A:%.*]] = alloca { float, float }, align 4 | ||
| // FRTRN-NEXT: [[B:%.*]] = alloca { float, float }, align 4 | ||
| // FRTRN-NEXT: store <2 x float> [[A_COERCE]], ptr [[A]], align 4 | ||
| // FRTRN-NEXT: store <2 x float> [[B_COERCE]], ptr [[B]], align 4 | ||
| // FRTRN-NEXT: [[A_REALP:%.*]] = getelementptr inbounds { float, float }, ptr [[A]], i32 0, i32 0 | ||
| // FRTRN-NEXT: [[A_REAL:%.*]] = load float, ptr [[A_REALP]], align 4 | ||
| // FRTRN-NEXT: [[A_IMAGP:%.*]] = getelementptr inbounds { float, float }, ptr [[A]], i32 0, i32 1 | ||
| // FRTRN-NEXT: [[A_IMAG:%.*]] = load float, ptr [[A_IMAGP]], align 4 | ||
| // FRTRN-NEXT: [[B_REALP:%.*]] = getelementptr inbounds { float, float }, ptr [[B]], i32 0, i32 0 | ||
| // FRTRN-NEXT: [[B_REAL:%.*]] = load float, ptr [[B_REALP]], align 4 | ||
| // FRTRN-NEXT: [[B_IMAGP:%.*]] = getelementptr inbounds { float, float }, ptr [[B]], i32 0, i32 1 | ||
| // FRTRN-NEXT: [[B_IMAG:%.*]] = load float, ptr [[B_IMAGP]], align 4 | ||
| // FRTRN-NEXT: [[TMP0:%.*]] = call float @llvm.fabs.f32(float [[B_REAL]]) | ||
| // FRTRN-NEXT: [[TMP1:%.*]] = call float @llvm.fabs.f32(float [[B_IMAG]]) | ||
| // FRTRN-NEXT: [[ABS_CMP:%.*]] = fcmp ugt float [[TMP0]], [[TMP1]] | ||
| // FRTRN-NEXT: br i1 [[ABS_CMP]], label [[ABS_RHSR_GREATER_OR_EQUAL_ABS_RHSI:%.*]], label [[ABS_RHSR_LESS_THAN_ABS_RHSI:%.*]] | ||
| // FRTRN: abs_rhsr_greater_or_equal_abs_rhsi: | ||
| // FRTRN-NEXT: [[TMP2:%.*]] = fdiv float [[B_IMAG]], [[B_REAL]] | ||
| // FRTRN-NEXT: [[TMP3:%.*]] = fmul float [[TMP2]], [[B_IMAG]] | ||
| // FRTRN-NEXT: [[TMP4:%.*]] = fadd float [[B_REAL]], [[TMP3]] | ||
| // FRTRN-NEXT: [[TMP5:%.*]] = fmul float [[A_IMAG]], [[TMP2]] | ||
| // FRTRN-NEXT: [[TMP6:%.*]] = fadd float [[A_REAL]], [[TMP5]] | ||
| // FRTRN-NEXT: [[TMP7:%.*]] = fdiv float [[TMP6]], [[TMP4]] | ||
| // FRTRN-NEXT: [[TMP8:%.*]] = fmul float [[A_REAL]], [[TMP2]] | ||
| // FRTRN-NEXT: [[TMP9:%.*]] = fsub float [[A_IMAG]], [[TMP8]] | ||
| // FRTRN-NEXT: [[TMP10:%.*]] = fdiv float [[TMP9]], [[TMP4]] | ||
| // FRTRN-NEXT: br label [[COMPLEX_DIV:%.*]] | ||
| // FRTRN: abs_rhsr_less_than_abs_rhsi: | ||
| // FRTRN-NEXT: [[TMP11:%.*]] = fdiv float [[B_REAL]], [[B_IMAG]] | ||
| // FRTRN-NEXT: [[TMP12:%.*]] = fmul float [[TMP11]], [[B_REAL]] | ||
| // FRTRN-NEXT: [[TMP13:%.*]] = fadd float [[B_IMAG]], [[TMP12]] | ||
| // FRTRN-NEXT: [[TMP14:%.*]] = fmul float [[A_REAL]], [[TMP11]] | ||
| // FRTRN-NEXT: [[TMP15:%.*]] = fadd float [[TMP14]], [[A_IMAG]] | ||
| // FRTRN-NEXT: [[TMP16:%.*]] = fdiv float [[TMP15]], [[TMP13]] | ||
| // FRTRN-NEXT: [[TMP17:%.*]] = fmul float [[A_IMAG]], [[TMP11]] | ||
| // FRTRN-NEXT: [[TMP18:%.*]] = fsub float [[TMP17]], [[A_REAL]] | ||
| // FRTRN-NEXT: [[TMP19:%.*]] = fdiv float [[TMP18]], [[TMP13]] | ||
| // FRTRN-NEXT: br label [[COMPLEX_DIV]] | ||
| // FRTRN: complex_div: | ||
| // FRTRN-NEXT: [[TMP20:%.*]] = phi float [ [[TMP7]], [[ABS_RHSR_GREATER_OR_EQUAL_ABS_RHSI]] ], [ [[TMP16]], [[ABS_RHSR_LESS_THAN_ABS_RHSI]] ] | ||
| // FRTRN-NEXT: [[TMP21:%.*]] = phi float [ [[TMP10]], [[ABS_RHSR_GREATER_OR_EQUAL_ABS_RHSI]] ], [ [[TMP19]], [[ABS_RHSR_LESS_THAN_ABS_RHSI]] ] | ||
| // FRTRN-NEXT: [[RETVAL_REALP:%.*]] = getelementptr inbounds { float, float }, ptr [[RETVAL]], i32 0, i32 0 | ||
| // FRTRN-NEXT: [[RETVAL_IMAGP:%.*]] = getelementptr inbounds { float, float }, ptr [[RETVAL]], i32 0, i32 1 | ||
| // FRTRN-NEXT: store float [[TMP20]], ptr [[RETVAL_REALP]], align 4 | ||
| // FRTRN-NEXT: store float [[TMP21]], ptr [[RETVAL_IMAGP]], align 4 | ||
| // FRTRN-NEXT: [[TMP22:%.*]] = load <2 x float>, ptr [[RETVAL]], align 4 | ||
| // FRTRN-NEXT: ret <2 x float> [[TMP22]] | ||
| // | ||
| _Complex float div(_Complex float a, _Complex float b) { | ||
| return a / b; | ||
| } |
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