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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
; Check that we fold the condition of branches of the
; form: br <condition> dest1, dest2, where dest1 == dest2.
define i32 @test(i32 %x) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[MERGE:%.*]], label [[MERGE]]
; CHECK: merge:
; CHECK-NEXT: ret i32 [[X:%.*]]
;
entry:
%cmp = icmp ult i32 %x, 7
br i1 %cmp, label %merge, label %merge
merge:
ret i32 %x
}
@global = global i8 0
define i32 @pat(i32 %x) {
; CHECK-LABEL: @pat(
; CHECK-NEXT: br i1 false, label [[PATATINO:%.*]], label [[PATATINO]]
; CHECK: patatino:
; CHECK-NEXT: ret i32 [[X:%.*]]
;
%y = icmp eq i32 27, ptrtoint(i8* @global to i32)
br i1 %y, label %patatino, label %patatino
patatino:
ret i32 %x
}
define i1 @test01(i1 %cond) {
; CHECK-LABEL: @test01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_FALSE_1:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[MERGE_1:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[MERGE_1]]
; CHECK: merge.1:
; CHECK-NEXT: br i1 [[COND]], label [[IF_TRUE_2:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[MERGE_2:%.*]]
; CHECK: if.false.2:
; CHECK-NEXT: br label [[MERGE_2]]
; CHECK: merge.2:
; CHECK-NEXT: ret i1 [[COND]]
;
entry:
br i1 %cond, label %if.true.1, label %if.false.1
if.true.1:
br label %merge.1
if.false.1:
br label %merge.1
merge.1:
%merge.cond.1 = phi i1 [true, %if.true.1], [false, %if.false.1]
br i1 %merge.cond.1, label %if.true.2, label %if.false.2
if.true.2:
br label %merge.2
if.false.2:
br label %merge.2
merge.2:
%merge.cond.2 = phi i1 [true, %if.true.2], [false, %if.false.2]
ret i1 %merge.cond.2
}
define i1 @test02(i1 %cond) {
; CHECK-LABEL: @test02(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_FALSE_1:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[MERGE_1:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[MERGE_1]]
; CHECK: merge.1:
; CHECK-NEXT: br i1 [[COND]], label [[IF_FALSE_2:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[MERGE_2:%.*]]
; CHECK: if.false.2:
; CHECK-NEXT: br label [[MERGE_2]]
; CHECK: merge.2:
; CHECK-NEXT: ret i1 [[COND]]
;
entry:
br i1 %cond, label %if.true.1, label %if.false.1
if.true.1:
br label %merge.1
if.false.1:
br label %merge.1
merge.1:
%merge.cond.1 = phi i1 [false, %if.true.1], [true, %if.false.1]
br i1 %merge.cond.1, label %if.true.2, label %if.false.2
if.true.2:
br label %merge.2
if.false.2:
br label %merge.2
merge.2:
%merge.cond.2 = phi i1 [false, %if.true.2], [true, %if.false.2]
ret i1 %merge.cond.2
}
|
