forked from OSchip/llvm-project
95 lines
2.9 KiB
LLVM
95 lines
2.9 KiB
LLVM
; RUN: opt -S < %s -jump-threading | FileCheck %s
|
|
|
|
; Keep block addresses alive.
|
|
@addresses = constant [4 x i8*] [
|
|
i8* blockaddress(@test1, %L1), i8* blockaddress(@test1, %L2),
|
|
i8* blockaddress(@test2, %L1), i8* blockaddress(@test2, %L2)
|
|
]
|
|
|
|
declare void @bar()
|
|
declare void @baz()
|
|
|
|
|
|
|
|
; Check basic jump threading for indirectbr instructions.
|
|
|
|
; CHECK: void @test1
|
|
; CHECK: br i1 %tobool, label %L1, label %indirectgoto
|
|
; CHECK-NOT: if.else:
|
|
; CHECK: L1:
|
|
; CHECK: indirectbr i8* %address, [label %L1, label %L2]
|
|
define void @test1(i32 %i, i8* %address) nounwind {
|
|
entry:
|
|
%rem = srem i32 %i, 2
|
|
%tobool = icmp ne i32 %rem, 0
|
|
br i1 %tobool, label %indirectgoto, label %if.else
|
|
|
|
if.else: ; preds = %entry
|
|
br label %indirectgoto
|
|
|
|
L1: ; preds = %indirectgoto
|
|
call void @bar()
|
|
ret void
|
|
|
|
L2: ; preds = %indirectgoto
|
|
call void @baz()
|
|
ret void
|
|
|
|
indirectgoto: ; preds = %if.else, %entry
|
|
%indirect.goto.dest = phi i8* [ %address, %if.else ], [ blockaddress(@test1, %L1), %entry ]
|
|
indirectbr i8* %indirect.goto.dest, [label %L1, label %L2]
|
|
}
|
|
|
|
|
|
; Check constant folding of indirectbr
|
|
|
|
; CHECK: void @test2
|
|
; CHECK: entry:
|
|
; CHECK-NEXT: br label %L1
|
|
; CHECK: L1:
|
|
; CHECK-NEXT: call void @bar
|
|
; CHECK-NEXT: ret void
|
|
define void @test2() nounwind {
|
|
entry:
|
|
indirectbr i8* blockaddress(@test2, %L1), [label %L1, label %L2]
|
|
|
|
L1: ; preds = %indirectgoto
|
|
call void @bar()
|
|
ret void
|
|
|
|
L2: ; preds = %indirectgoto
|
|
call void @baz()
|
|
ret void
|
|
}
|
|
|
|
|
|
; PR4151
|
|
; Don't merge address-taken blocks.
|
|
@.str = private unnamed_addr constant [4 x i8] c"%p\0A\00"
|
|
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK: __here:
|
|
; CHECK: blockaddress(@test3, %__here)
|
|
; CHECK: __here1:
|
|
; CHECK: blockaddress(@test3, %__here1)
|
|
; CHECK: __here3:
|
|
; CHECK: blockaddress(@test3, %__here3)
|
|
define void @test3() nounwind ssp noredzone {
|
|
entry:
|
|
br label %__here
|
|
|
|
__here: ; preds = %entry
|
|
%call = call i32 (...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here) to i64)) nounwind noredzone
|
|
br label %__here1
|
|
|
|
__here1: ; preds = %__here
|
|
%call2 = call i32 (...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here1) to i64)) nounwind noredzone
|
|
br label %__here3
|
|
|
|
__here3: ; preds = %__here1
|
|
%call4 = call i32 (...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i64 ptrtoint (i8* blockaddress(@test3, %__here3) to i64)) nounwind noredzone
|
|
ret void
|
|
}
|
|
|
|
declare i32 @printf(...) noredzone
|