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TheRock/compiler/amd-llvm/llvm/test/Transforms/JumpThreading/callbr.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

64 lines
1.6 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=jump-threading -S | FileCheck %s
define i1 @func(i1 %arg, i32 %arg1, i1 %arg2) {
; CHECK-LABEL: @func(
; CHECK-NEXT: bb:
; CHECK-NEXT: br i1 [[ARG:%.*]], label [[BB7:%.*]], label [[BB4:%.*]]
; CHECK: bb4:
; CHECK-NEXT: callbr void asm sideeffect "", "!i"()
; CHECK-NEXT: to label [[BB7_THR_COMM:%.*]] [label %bb7.thr_comm]
; CHECK: bb7.thr_comm:
; CHECK-NEXT: [[I91:%.*]] = xor i1 [[ARG2:%.*]], [[ARG]]
; CHECK-NEXT: br i1 [[I91]], label [[BB11:%.*]], label [[BB11]]
; CHECK: bb7:
; CHECK-NEXT: [[I:%.*]] = icmp eq i32 [[ARG1:%.*]], 0
; CHECK-NEXT: [[I9:%.*]] = xor i1 [[I]], [[ARG]]
; CHECK-NEXT: br i1 [[I9]], label [[BB11]], label [[BB11]]
; CHECK: bb11:
; CHECK-NEXT: [[I93:%.*]] = phi i1 [ [[I91]], [[BB7_THR_COMM]] ], [ [[I9]], [[BB7]] ], [ [[I91]], [[BB7_THR_COMM]] ], [ [[I9]], [[BB7]] ]
; CHECK-NEXT: ret i1 [[I93]]
;
bb:
br i1 %arg, label %bb3, label %bb4
bb3:
%i = icmp eq i32 %arg1, 0
br label %bb7
bb4:
callbr void asm sideeffect "", "!i"()
to label %bb5 [label %bb6]
bb5:
br label %bb6
bb6:
br label %bb7
bb7:
%i8 = phi i1 [ %i, %bb3 ], [ %arg2, %bb6 ]
%i9 = xor i1 %i8, %arg
br i1 %i9, label %bb11, label %bb10
bb10:
br label %bb11
bb11:
ret i1 %i9
}
define i32 @callbr_no_block_merge() {
; CHECK-LABEL: @callbr_no_block_merge(
; CHECK-NEXT: [[X:%.*]] = callbr i32 asm sideeffect "", "=r"()
; CHECK-NEXT: to label [[BB:%.*]] []
; CHECK: bb:
; CHECK-NEXT: ret i32 [[X]]
;
%x = callbr i32 asm sideeffect "", "=r"()
to label %bb []
bb:
ret i32 %x
}