| ; REQUIRES: asserts |
| ; RUN: opt -mtriple=systemz-unknown -mcpu=z13 -O3 -disable-output %s |
| |
| ; During transform to LCSSA, an access becomes obfuscated to: |
| ; (2 = phi (phi(val), val)), which BasicAA fails to analyze. |
| ; It's currently hard coded in BasicAA to return MayAlias for nested phis. |
| ; This leads MemorySSA to finding a new (false) clobber for a previously |
| ; optimized access. With verifyClobber included in verifyMemorySSA, such a |
| ; transformation will cause MemorySSA verification to fail. |
| ; If the verifyClobber is re-enabled, this test will crash. |
| |
| target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64" |
| target triple = "s390x-ibm-linux" |
| |
| %0 = type <{ i64, i8, i64, i16 }> |
| |
| @g_54 = external dso_local global i16, align 2 |
| @g_101 = external dso_local global <{ i64, i8, i64, i8, i8 }>, align 2 |
| |
| declare dso_local void @safe_lshift_func_int16_t_s_s() |
| declare dso_local i8 @safe_div_func_int8_t_s_s() |
| |
| define dso_local void @func_47(%0* %arg) { |
| bb: |
| %tmp = alloca i32, align 4 |
| br label %bb1 |
| |
| bb1: ; preds = %bb12, %bb |
| %tmp2 = getelementptr inbounds %0, %0* %arg, i32 0, i32 3 |
| store i16 undef, i16* %tmp2, align 1 |
| %tmp3 = call signext i8 @safe_div_func_int8_t_s_s() |
| %tmp7 = icmp ne i8 %tmp3, 0 |
| br i1 %tmp7, label %bb8, label %bb10 |
| |
| bb8: ; preds = %bb1 |
| %tmp9 = icmp eq i32 0, 0 |
| br i1 %tmp9, label %bb12, label %bb13 |
| |
| bb10: ; preds = %bb10, %bb1 |
| call void @safe_lshift_func_int16_t_s_s() |
| %tmp11 = getelementptr inbounds %0, %0* %arg, i32 0, i32 3 |
| store i16 0, i16* %tmp11, align 1 |
| store i8 0, i8* getelementptr inbounds (%0, %0* bitcast (<{ i64, i8, i64, i8, i8 }>* @g_101 to %0*), i32 0, i32 1), align 2 |
| br label %bb10 |
| |
| bb12: ; preds = %bb8 |
| store i16 0, i16* @g_54, align 2 |
| br label %bb1 |
| |
| bb13: ; preds = %bb8 |
| ret void |
| } |
| |
| |
