6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-26 12:20:42 +00:00
Code Issues Projects Releases Wiki Activity

Adds missing TLI check for library simplification of

Browse Source 
* pow(x, 0.5) -> fabs(sqrt(x)) 
* pow(2.0, x) -> exp2(x)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Kuperstein
2013-08-19 06:55:47 +00:00
parent a0e735ee16
commit 2063637fa7
3 changed files with 31 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/Transforms/InstCombine/pow-1.ll
+13
View File
@@ -151,4 +151,17 @@ define double @test_simplify16(double %x) {
; CHECK-NEXT: ret double [[RECIPROCAL]]
}
declare double @llvm.pow.f64(double %Val, double %Power)
define double @test_simplify17(double %x) {
; CHECK-LABEL: @test_simplify17(
%retval = call double @llvm.pow.f64(double %x, double 0.5)
; CHECK-NEXT: [[SQRT:%[a-z0-9]+]] = call double @sqrt(double %x) [[NUW_RO]]
; CHECK-NEXT: [[FABS:%[a-z0-9]+]] = call double @fabs(double [[SQRT]]) [[NUW_RO]]
; CHECK-NEXT: [[FCMP:%[a-z0-9]+]] = fcmp oeq double %x, 0xFFF0000000000000
; CHECK-NEXT: [[SELECT:%[a-z0-9]+]] = select i1 [[FCMP]], double 0x7FF0000000000000, double [[FABS]]
ret double %retval
; CHECK-NEXT: ret double [[SELECT]]
}
; CHECK: attributes [[NUW_RO]] = { nounwind readonly }
test/Transforms/InstCombine/pow-3.ll
+12
View File
@@ -0,0 +1,12 @@
; Test that the pow won't get simplified to sqrt(fabs) when they are not available.
;
; RUN: opt < %s -disable-simplify-libcalls -instcombine -S | FileCheck %s
declare double @llvm.pow.f64(double %Val, double %Power)
define double @test_simplify_unavailable(double %x) {
; CHECK-LABEL: @test_simplify_unavailable(
%retval = call double @llvm.pow.f64(double %x, double 0.5)
; CHECK-NEXT: call double @llvm.pow.f64(double %x, double 5.000000e-01)
ret double %retval
}