mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-22 04:22:57 +02:00
a05de79cbb
A PHI node usually has only one value/basic block pair per incoming basic block. In the case of a switch statement it is possible that a following PHI node may have more than one such pair per incoming basic block. E.g.: %0 = phi i64 [ 123456, %case2 ], [ 654321, %Entry ], [ 654321, %Entry ] This is valid and the verfier doesn't complain, because both values are the same. Constant hoisting materializes the constant for each operand separately and the value is still the same, but the variable names have changed. As a result the verfier can't recognize anymore that they are the same value and complains. This fix adds special update code for PHI node in constant hoisting to prevent this corner case. This fixes <rdar://problem/16394449> llvm-svn: 204537
117 lines
3.0 KiB
LLVM
117 lines
3.0 KiB
LLVM
; RUN: opt -S -consthoist < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macosx10.9.0"
|
|
|
|
; PR18626
|
|
define i8* @test1(i1 %cmp, i64* %tmp) {
|
|
entry:
|
|
call void @foo(i8* inttoptr (i64 68719476735 to i8*))
|
|
br i1 %cmp, label %if.end, label %return
|
|
|
|
if.end: ; preds = %bb1
|
|
call void @foo(i8* inttoptr (i64 68719476736 to i8*))
|
|
br label %return
|
|
|
|
return:
|
|
%retval.0 = phi i8* [ null, %entry ], [ inttoptr (i64 68719476736 to i8*), %if.end ]
|
|
store i64 1172321806, i64* %tmp
|
|
ret i8* %retval.0
|
|
|
|
; CHECK-LABEL: @test1
|
|
; CHECK: if.end:
|
|
; CHECK: %2 = inttoptr i64 %const to i8*
|
|
; CHECK-NEXT: br
|
|
; CHECK: return:
|
|
; CHECK-NEXT: %retval.0 = phi i8* [ null, %entry ], [ %2, %if.end ]
|
|
}
|
|
|
|
define void @test2(i1 %cmp, i64** %tmp) {
|
|
entry:
|
|
call void @foo(i8* inttoptr (i64 68719476736 to i8*))
|
|
br i1 %cmp, label %if.end, label %return
|
|
|
|
if.end: ; preds = %bb1
|
|
call void @foo(i8* inttoptr (i64 68719476736 to i8*))
|
|
br label %return
|
|
|
|
return:
|
|
store i64* inttoptr (i64 68719476735 to i64*), i64** %tmp
|
|
ret void
|
|
|
|
; CHECK-LABEL: @test2
|
|
; CHECK: return:
|
|
; CHECK-NEXT: %const_mat = add i64 %const, -1
|
|
; CHECK-NEXT: inttoptr i64 %const_mat to i64*
|
|
}
|
|
|
|
declare void @foo(i8*)
|
|
|
|
; PR18768
|
|
define i32 @test3(i1 %c) {
|
|
entry:
|
|
br i1 %c, label %if.then, label %if.end3
|
|
|
|
if.then: ; preds = %entry
|
|
br label %if.end3
|
|
|
|
if.end3: ; preds = %if.then, %entry
|
|
%d.0 = phi i32* [ inttoptr (i64 985162435264511 to i32*), %entry ], [ null, %if.then ]
|
|
%cmp4 = icmp eq i32* %d.0, inttoptr (i64 985162435264511 to i32*)
|
|
%cmp6 = icmp eq i32* %d.0, inttoptr (i64 985162418487296 to i32*)
|
|
%or = or i1 %cmp4, %cmp6
|
|
br i1 %or, label %if.then8, label %if.end9
|
|
|
|
if.then8: ; preds = %if.end3
|
|
ret i32 1
|
|
|
|
if.end9: ; preds = %if.then8, %if.end3
|
|
ret i32 undef
|
|
}
|
|
|
|
; <rdar://problem/16394449>
|
|
define i64 @switch_test1(i64 %a) {
|
|
; CHECK-LABEL: @switch_test1
|
|
; CHECK: %0 = phi i64 [ %const, %case2 ], [ %const_mat, %Entry ], [ %const_mat, %Entry ]
|
|
Entry:
|
|
%sel = add i64 %a, 4519019440
|
|
switch i64 %sel, label %fail [
|
|
i64 462, label %continuation
|
|
i64 449, label %case2
|
|
i64 443, label %continuation
|
|
]
|
|
|
|
case2:
|
|
br label %continuation
|
|
|
|
continuation:
|
|
%0 = phi i64 [ 4519019440, %case2 ], [ 4519019460, %Entry ], [ 4519019460, %Entry ]
|
|
ret i64 0;
|
|
|
|
fail:
|
|
ret i64 -1;
|
|
}
|
|
|
|
define i64 @switch_test2(i64 %a) {
|
|
; CHECK-LABEL: @switch_test2
|
|
; CHECK: %2 = phi i64* [ %1, %case2 ], [ %0, %Entry ], [ %0, %Entry ]
|
|
Entry:
|
|
%sel = add i64 %a, 4519019440
|
|
switch i64 %sel, label %fail [
|
|
i64 462, label %continuation
|
|
i64 449, label %case2
|
|
i64 443, label %continuation
|
|
]
|
|
|
|
case2:
|
|
br label %continuation
|
|
|
|
continuation:
|
|
%0 = phi i64* [ inttoptr(i64 4519019440 to i64*), %case2 ], [ inttoptr(i64 4519019460 to i64*), %Entry ], [ inttoptr(i64 4519019460 to i64*), %Entry ]
|
|
ret i64 0;
|
|
|
|
fail:
|
|
ret i64 -1;
|
|
}
|
|
|