xref: /llvm-project/llvm/test/Transforms/LoopStrengthReduce/invariant_value_first_arg.ll (revision 055fb7795aa219a3d274d280ec9129784f169f56) 
1; Check that the index of 'P[outer]' is pulled out of the loop.
2; RUN: opt < %s -loop-reduce -S | \
3; RUN:   not grep "getelementptr.*ptr %INDVAR"
4
5target datalayout = "e-p:32:32:32-n32"
6declare i1 @pred()
7
8define void @test(ptr %P, i32 %outer) {
9; <label>:0
10	br label %Loop
11Loop:		; preds = %Loop, %0
12	%INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ]		; <i32> [#uses=2]
13	%STRRED = getelementptr [10000 x i32], ptr %P, i32 %outer, i32 %INDVAR		; <ptr> [#uses=1]
14	store i32 0, ptr %STRRED
15	%INDVAR2 = add i32 %INDVAR, 1		; <i32> [#uses=1]
16	%cond = call i1 @pred( )		; <i1> [#uses=1]
17	br i1 %cond, label %Loop, label %Out
18Out:		; preds = %Loop
19	ret void
20}
21
22