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clang-p2996/llvm/test/Transforms/InstCombine/log-pow.ll
David Green 5184d763c7 [InstCombine] Convert @log to @llvm.log if the input is known positive. (#111428) 
Similar to 112aac4e89, this converts log
libcalls to llvm.log.f64 intrinsics if we know they do not set errno, as
the input is not zero and not negative. As log will produce errno if the
input is 0 (returning -inf) or if the input is negative (returning nan),
we also perform the conversion when we have noinf and nonan.
2024-10-10 09:54:25 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define double @log_pow(double %x, double %y) {
; CHECK-LABEL: @log_pow(
; CHECK-NEXT: [[LOG1:%.*]] = call fast double @llvm.log.f64(double [[X:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[Y:%.*]], [[LOG1]]
; CHECK-NEXT: ret double [[MUL]]
;
%pow = call fast double @pow(double %x, double %y)
%log = call fast double @log(double %pow)
ret double %log
}
define double @log_powi_const(double %x) {
; CHECK-LABEL: @log_powi_const(
; CHECK-NEXT: [[LOG1:%.*]] = call fast double @llvm.log.f64(double [[X:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[LOG1]], -3.000000e+00
; CHECK-NEXT: ret double [[MUL]]
;
%pow = call fast double @llvm.powi.f64.i32(double %x, i32 -3)
%log = call fast double @log(double %pow)
ret double %log
}
define double @log_powi_nonconst(double %x, i32 %y) {
; CHECK-LABEL: @log_powi_nonconst(
; CHECK-NEXT: [[LOG1:%.*]] = call fast double @llvm.log.f64(double [[X:%.*]])
; CHECK-NEXT: [[CAST:%.*]] = sitofp i32 [[Y:%.*]] to double
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[LOG1]], [[CAST]]
; CHECK-NEXT: ret double [[MUL]]
;
%pow = call fast double @llvm.powi.f64.i32(double %x, i32 %y)
%log = call fast double @log(double %pow)
ret double %log
}
define double @logf64_powi_nonconst(double %x, i32 %y) {
; CHECK-LABEL: @logf64_powi_nonconst(
; CHECK-NEXT: [[LOG1:%.*]] = call fast double @llvm.log.f64(double [[X:%.*]])
; CHECK-NEXT: [[CAST:%.*]] = sitofp i32 [[Y:%.*]] to double
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[LOG1]], [[CAST]]
; CHECK-NEXT: ret double [[MUL]]
;
%pow = call fast double @llvm.powi.f64.i32(double %x, i32 %y)
%log = call fast double @llvm.log.f64(double %pow)
ret double %log
}
define float @logf_powfi_const(float %x) {
; CHECK-LABEL: @logf_powfi_const(
; CHECK-NEXT: [[LOG1:%.*]] = call fast float @llvm.log.f32(float [[X:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[LOG1]], -3.000000e+00
; CHECK-NEXT: ret float [[MUL]]
;
%pow = call fast float @llvm.powi.f32.i32(float %x, i32 -3)
%log = call fast float @logf(float %pow)
ret float %log
}
define float @logf_powfi_nonconst(float %x, i32 %y) {
; CHECK-LABEL: @logf_powfi_nonconst(
; CHECK-NEXT: [[LOG1:%.*]] = call fast float @llvm.log.f32(float [[X:%.*]])
; CHECK-NEXT: [[CAST:%.*]] = sitofp i32 [[Y:%.*]] to float
; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[LOG1]], [[CAST]]
; CHECK-NEXT: ret float [[MUL]]
;
%pow = call fast float @llvm.powi.f32.i32(float %x, i32 %y)
%log = call fast float @logf(float %pow)
ret float %log
}
define double @log_powi_not_fast(double %x, i32 %y) {
; CHECK-LABEL: @log_powi_not_fast(
; CHECK-NEXT: [[POW:%.*]] = call double @llvm.powi.f64.i32(double [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: [[LOG:%.*]] = call fast double @llvm.log.f64(double [[POW]])
; CHECK-NEXT: ret double [[LOG]]
;
%pow = call double @llvm.powi.f64.i32(double %x, i32 %y)
%log = call fast double @log(double %pow)
ret double %log
}
define float @log10f_powf(float %x, float %y) {
; CHECK-LABEL: @log10f_powf(
; CHECK-NEXT: [[LOG1:%.*]] = call fast float @llvm.log10.f32(float [[X:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[Y:%.*]], [[LOG1]]
; CHECK-NEXT: ret float [[MUL]]
;
%pow = call fast float @powf(float %x, float %y)
%log = call fast float @llvm.log10.f32(float %pow)
ret float %log
}
define <2 x double> @log2v_powv(<2 x double> %x, <2 x double> %y) {
; CHECK-LABEL: @log2v_powv(
; CHECK-NEXT: [[LOG1:%.*]] = call fast <2 x double> @llvm.log2.v2f64(<2 x double> [[X:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast <2 x double> [[Y:%.*]], [[LOG1]]
; CHECK-NEXT: ret <2 x double> [[MUL]]
;
%pow = call fast <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> %y)
%log = call fast <2 x double> @llvm.log2.v2f64(<2 x double> %pow)
ret <2 x double> %log
}
define double @log_pow_not_fast(double %x, double %y) {
; CHECK-LABEL: @log_pow_not_fast(
; CHECK-NEXT: [[POW:%.*]] = call double @pow(double [[X:%.*]], double [[Y:%.*]])
; CHECK-NEXT: [[LOG:%.*]] = call fast double @llvm.log.f64(double [[POW]])
; CHECK-NEXT: ret double [[LOG]]
;
%pow = call double @pow(double %x, double %y)
%log = call fast double @log(double %pow)
ret double %log
}
define float @function_pointer(ptr %fptr, float %p1) {
; CHECK-LABEL: @function_pointer(
; CHECK-NEXT: [[PTR:%.*]] = call float [[FPTR:%.*]]()
; CHECK-NEXT: [[LOG:%.*]] = call float @logf(float [[PTR]])
; CHECK-NEXT: ret float [[LOG]]
;
%ptr = call float %fptr()
%log = call float @logf(float %ptr)
ret float %log
}
define double @log10_exp(double %x) {
; CHECK-LABEL: @log10_exp(
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[X:%.*]], 0x3FDBCB7B1526E50E
; CHECK-NEXT: ret double [[MUL]]
;
%exp = call fast double @exp(double %x)
%log = call fast double @log10(double %exp)
ret double %log
}
define <2 x float> @logv_exp2v(<2 x float> %x) {
; CHECK-LABEL: @logv_exp2v(
; CHECK-NEXT: [[MUL:%.*]] = fmul fast <2 x float> [[X:%.*]], <float 0x3FE62E4300000000, float 0x3FE62E4300000000>
; CHECK-NEXT: ret <2 x float> [[MUL]]
;
%exp = call fast <2 x float> @llvm.exp2.v2f32(<2 x float> %x)
%log = call fast <2 x float> @llvm.log.v2f32(<2 x float> %exp)
ret <2 x float> %log
}
define float @log2f_exp10f(float %x) {
; CHECK-LABEL: @log2f_exp10f(
; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[X:%.*]], 0x400A934F00000000
; CHECK-NEXT: ret float [[MUL]]
;
%exp = call fast float @exp10f(float %x)
%log = call fast float @log2f(float %exp)
ret float %log
}
define double @log_exp2_not_fast(double %x) {
; CHECK-LABEL: @log_exp2_not_fast(
; CHECK-NEXT: [[EXP:%.*]] = call double @exp2(double [[X:%.*]])
; CHECK-NEXT: [[LOG:%.*]] = call fast double @llvm.log.f64(double [[EXP]])
; CHECK-NEXT: ret double [[LOG]]
;
%exp = call double @exp2(double %x)
%log = call fast double @log(double %exp)
ret double %log
}
define double @pr43617(double %d, i32 %i, ptr %f) {
; CHECK-LABEL: @pr43617(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = fneg double [[D:%.*]]
; CHECK-NEXT: [[ICALL:%.*]] = tail call fast double [[F:%.*]](i32 [[I:%.*]])
; CHECK-NEXT: [[LOG:%.*]] = tail call fast double @llvm.log.f64(double [[ICALL]])
; CHECK-NEXT: [[MUL:%.*]] = fmul double [[LOG]], [[SUB]]
; CHECK-NEXT: ret double [[MUL]]
;
entry:
%sub = fsub double -0.000000e+00, %d
%icall = tail call fast double %f(i32 %i)
%log = tail call fast double @llvm.log.f64(double %icall)
%mul = fmul double %log, %sub
ret double %mul
}
declare double @log(double) #0
declare float @logf(float) #0
declare double @llvm.log.f64(double) #0
declare <2 x float> @llvm.log.v2f32(<2 x float>)
declare float @log2f(float) #0
declare <2 x double> @llvm.log2.v2f64(<2 x double>)
declare double @log10(double) #0
declare float @llvm.log10.f32(float)
declare double @exp(double %x) #0
declare double @exp2(double) #0
declare float @exp10f(float) #0
declare <2 x float> @llvm.exp2.v2f32(<2 x float>)
declare double @pow(double, double) #0
declare float @powf(float, float) #0
declare float @llvm.powi.f32.i32(float, i32) #0
declare double @llvm.powi.f64.i32(double, i32) #0
declare <2 x double> @llvm.pow.v2f64(<2 x double>, <2 x double>)
attributes #0 = { nounwind readnone }
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