| ; RUN: opt < %s -std-compile-opts -S | grep volatile | count 3 |
| ; PR1520 |
| ; Don't promote volatile loads/stores. This is really needed to handle setjmp/lonjmp properly. |
| |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32" |
| target triple = "i686-pc-linux-gnu" |
| %struct.__jmp_buf_tag = type { [6 x i32], i32, %struct.__sigset_t } |
| %struct.__sigset_t = type { [32 x i32] } |
| @j = external global [1 x %struct.__jmp_buf_tag] ; <[1 x %struct.__jmp_buf_tag]*> [#uses=1] |
| |
| define i32 @f() { |
| entry: |
| %retval = alloca i32, align 4 ; <i32*> [#uses=2] |
| %v = alloca i32, align 4 ; <i32*> [#uses=3] |
| %tmp = alloca i32, align 4 ; <i32*> [#uses=3] |
| %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] |
| volatile store i32 0, i32* %v, align 4 |
| %tmp1 = call i32 @_setjmp( %struct.__jmp_buf_tag* getelementptr ([1 x %struct.__jmp_buf_tag]* @j, i32 0, i32 0) ) ; <i32> [#uses=1] |
| %tmp2 = icmp ne i32 %tmp1, 0 ; <i1> [#uses=1] |
| %tmp23 = zext i1 %tmp2 to i8 ; <i8> [#uses=1] |
| %toBool = icmp ne i8 %tmp23, 0 ; <i1> [#uses=1] |
| br i1 %toBool, label %bb, label %bb5 |
| |
| bb: ; preds = %entry |
| %tmp4 = volatile load i32* %v, align 4 ; <i32> [#uses=1] |
| store i32 %tmp4, i32* %tmp, align 4 |
| br label %bb6 |
| |
| bb5: ; preds = %entry |
| volatile store i32 1, i32* %v, align 4 |
| call void @g( ) |
| store i32 0, i32* %tmp, align 4 |
| br label %bb6 |
| |
| bb6: ; preds = %bb5, %bb |
| %tmp7 = load i32* %tmp, align 4 ; <i32> [#uses=1] |
| store i32 %tmp7, i32* %retval, align 4 |
| br label %return |
| |
| return: ; preds = %bb6 |
| %retval8 = load i32* %retval ; <i32> [#uses=1] |
| ret i32 %retval8 |
| } |
| |
| declare i32 @_setjmp(%struct.__jmp_buf_tag*) returns_twice |
| |
| declare void @g() |
