mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-06 21:05:51 +00:00
50b957549b
is sabre. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81528 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
670 B
LLVM
22 lines
670 B
LLVM
; RUN: opt < %s -sccp -loop-deletion -simplifycfg -S | not grep br
|
|
|
|
; No matter how hard you try, sqrt(1.0) is always 1.0. This allows the
|
|
; optimizer to delete this loop.
|
|
|
|
declare double @sqrt(double)
|
|
|
|
define double @test(i32 %param) {
|
|
entry:
|
|
br label %Loop
|
|
Loop: ; preds = %Loop, %entry
|
|
%I2 = phi i32 [ 0, %entry ], [ %I3, %Loop ] ; <i32> [#uses=1]
|
|
%V = phi double [ 1.000000e+00, %entry ], [ %V2, %Loop ] ; <double> [#uses=2]
|
|
%V2 = call double @sqrt( double %V ) ; <double> [#uses=1]
|
|
%I3 = add i32 %I2, 1 ; <i32> [#uses=2]
|
|
%tmp.7 = icmp ne i32 %I3, %param ; <i1> [#uses=1]
|
|
br i1 %tmp.7, label %Loop, label %Exit
|
|
Exit: ; preds = %Loop
|
|
ret double %V
|
|
}
|
|
|