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- ; RUN: opt < %s -O3 -S | grep volatile | count 3
- ; PR1520
- ; Don't promote load volatiles/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]
- store volatile i32 0, i32* %v, align 4
- %tmp1 = call i32 @_setjmp( %struct.__jmp_buf_tag* getelementptr ([1 x %struct.__jmp_buf_tag], [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 = load volatile i32, i32* %v, align 4 ; <i32> [#uses=1]
- store i32 %tmp4, i32* %tmp, align 4
- br label %bb6
- bb5: ; preds = %entry
- store volatile 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, i32* %tmp, align 4 ; <i32> [#uses=1]
- store i32 %tmp7, i32* %retval, align 4
- br label %return
- return: ; preds = %bb6
- %retval8 = load i32, i32* %retval ; <i32> [#uses=1]
- ret i32 %retval8
- }
- declare i32 @_setjmp(%struct.__jmp_buf_tag*) returns_twice
- declare void @g()
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