| ; RUN: opt < %s -mem2reg -instcombine -S | grep store |
| ; PR590 |
| |
| |
| define void @zero(i8* %p, i32 %n) { |
| entry: |
| %p_addr = alloca i8* ; <i8**> [#uses=2] |
| %n_addr = alloca i32 ; <i32*> [#uses=2] |
| %i = alloca i32 ; <i32*> [#uses=6] |
| %out = alloca i32 ; <i32*> [#uses=2] |
| %undef = alloca i32 ; <i32*> [#uses=2] |
| store i8* %p, i8** %p_addr |
| store i32 %n, i32* %n_addr |
| store i32 0, i32* %i |
| br label %loopentry |
| loopentry: ; preds = %endif, %entry |
| %tmp.0 = load i32, i32* %n_addr ; <i32> [#uses=1] |
| %tmp.1 = add i32 %tmp.0, 1 ; <i32> [#uses=1] |
| %tmp.2 = load i32, i32* %i ; <i32> [#uses=1] |
| %tmp.3 = icmp sgt i32 %tmp.1, %tmp.2 ; <i1> [#uses=2] |
| %tmp.4 = zext i1 %tmp.3 to i32 ; <i32> [#uses=0] |
| br i1 %tmp.3, label %no_exit, label %return |
| no_exit: ; preds = %loopentry |
| %tmp.5 = load i32, i32* %undef ; <i32> [#uses=1] |
| store i32 %tmp.5, i32* %out |
| store i32 0, i32* %undef |
| %tmp.6 = load i32, i32* %i ; <i32> [#uses=1] |
| %tmp.7 = icmp sgt i32 %tmp.6, 0 ; <i1> [#uses=2] |
| %tmp.8 = zext i1 %tmp.7 to i32 ; <i32> [#uses=0] |
| br i1 %tmp.7, label %then, label %endif |
| then: ; preds = %no_exit |
| %tmp.9 = load i8*, i8** %p_addr ; <i8*> [#uses=1] |
| %tmp.10 = load i32, i32* %i ; <i32> [#uses=1] |
| %tmp.11 = sub i32 %tmp.10, 1 ; <i32> [#uses=1] |
| %tmp.12 = getelementptr i8, i8* %tmp.9, i32 %tmp.11 ; <i8*> [#uses=1] |
| %tmp.13 = load i32, i32* %out ; <i32> [#uses=1] |
| %tmp.14 = trunc i32 %tmp.13 to i8 ; <i8> [#uses=1] |
| store i8 %tmp.14, i8* %tmp.12 |
| br label %endif |
| endif: ; preds = %then, %no_exit |
| %tmp.15 = load i32, i32* %i ; <i32> [#uses=1] |
| %inc = add i32 %tmp.15, 1 ; <i32> [#uses=1] |
| store i32 %inc, i32* %i |
| br label %loopentry |
| return: ; preds = %loopentry |
| ret void |
| } |
