55 lines
2.0 KiB
LLVM
55 lines
2.0 KiB
LLVM
|
; REQUIRES: asserts
|
||
|
|
; RUN: opt -mtriple=systemz-unknown -mcpu=z13 -O3 -enable-mssa-loop-dependency -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
|
||
|
|
}
|
||
|
|
|
||
|
|
|