1 ; RUN: opt < %s -instcombine -S | grep "load volatile" | count 2 2 ; PR2496 3 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-f80:128:128" 4 target triple = "i386-apple-darwin8" 5 @g_1 = internal global i32 0 ; <i32*> [#uses=3] 6 7 define i32 @main() nounwind { 8 entry: 9 %tmp93 = icmp slt i32 0, 10 ; <i1> [#uses=0] 10 %tmp34 = load volatile i32, i32* @g_1, align 4 ; <i32> [#uses=1] 11 br label %bb 12 13 bb: ; preds = %bb, %entry 14 %b.0.reg2mem.0 = phi i32 [ 0, %entry ], [ %tmp6, %bb ] ; <i32> [#uses=1] 15 %tmp3.reg2mem.0 = phi i32 [ %tmp3, %bb ], [ %tmp34, %entry ] 16 %tmp4 = add i32 %tmp3.reg2mem.0, 5 ; <i32> [#uses=1] 17 store volatile i32 %tmp4, i32* @g_1, align 4 18 %tmp6 = add i32 %b.0.reg2mem.0, 1 ; <i32> [#uses=2] 19 %tmp9 = icmp slt i32 %tmp6, 10 ; <i1> [#uses=1] 20 %tmp3 = load volatile i32, i32* @g_1, align 4 ; <i32> [#uses=1] 21 br i1 %tmp9, label %bb, label %bb11 22 23 bb11: ; preds = %bb 24 ret i32 0 25 } 26 27
