1 ; RUN: opt < %s -std-compile-opts -S | grep volatile | count 3 2 ; PR1520 3 ; Don't promote volatile loads/stores. This is really needed to handle setjmp/lonjmp properly. 4 5 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" 6 target triple = "i686-pc-linux-gnu" 7 %struct.__jmp_buf_tag = type { [6 x i32], i32, %struct.__sigset_t } 8 %struct.__sigset_t = type { [32 x i32] } 9 @j = external global [1 x %struct.__jmp_buf_tag] ; <[1 x %struct.__jmp_buf_tag]*> [#uses=1] 10 11 define i32 @f() { 12 entry: 13 %retval = alloca i32, align 4 ; <i32*> [#uses=2] 14 %v = alloca i32, align 4 ; <i32*> [#uses=3] 15 %tmp = alloca i32, align 4 ; <i32*> [#uses=3] 16 %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] 17 volatile store i32 0, i32* %v, align 4 18 %tmp1 = call i32 @_setjmp( %struct.__jmp_buf_tag* getelementptr ([1 x %struct.__jmp_buf_tag]* @j, i32 0, i32 0) ) ; <i32> [#uses=1] 19 %tmp2 = icmp ne i32 %tmp1, 0 ; <i1> [#uses=1] 20 %tmp23 = zext i1 %tmp2 to i8 ; <i8> [#uses=1] 21 %toBool = icmp ne i8 %tmp23, 0 ; <i1> [#uses=1] 22 br i1 %toBool, label %bb, label %bb5 23 24 bb: ; preds = %entry 25 %tmp4 = volatile load i32* %v, align 4 ; <i32> [#uses=1] 26 store i32 %tmp4, i32* %tmp, align 4 27 br label %bb6 28 29 bb5: ; preds = %entry 30 volatile store i32 1, i32* %v, align 4 31 call void @g( ) 32 store i32 0, i32* %tmp, align 4 33 br label %bb6 34 35 bb6: ; preds = %bb5, %bb 36 %tmp7 = load i32* %tmp, align 4 ; <i32> [#uses=1] 37 store i32 %tmp7, i32* %retval, align 4 38 br label %return 39 40 return: ; preds = %bb6 41 %retval8 = load i32* %retval ; <i32> [#uses=1] 42 ret i32 %retval8 43 } 44 45 declare i32 @_setjmp(%struct.__jmp_buf_tag*) 46 47 declare void @g() 48
