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llvm-mirror/test/CodeGen/ARM/ifcvt6.ll
Roman Lebedev 7dcf1654f8 [SimplifyCFG] Tail-merging all blocks with ret terminator
Based ontop of D104598, which is a NFCI-ish refactoring.
Here, a restriction, that only empty blocks can be merged, is lifted.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D104597
2021-06-24 13:15:39 +03:00

32 lines
870 B
LLVM

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s
define void @foo(i32 %X, i32 %Y) {
; CHECK-LABEL: foo:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: cmp r1, #0
; CHECK-NEXT: beq LBB0_2
; CHECK-NEXT: @ %bb.1: @ %entry
; CHECK-NEXT: cmp r0, #4
; CHECK-NEXT: bxhs lr
; CHECK-NEXT: LBB0_2: @ %cond_true
; CHECK-NEXT: push {lr}
; CHECK-NEXT: bl _bar
; CHECK-NEXT: pop {lr}
; CHECK-NEXT: bx lr
entry:
%tmp1 = icmp ult i32 %X, 4 ; <i1> [#uses=1]
%tmp4 = icmp eq i32 %Y, 0 ; <i1> [#uses=1]
%tmp7 = or i1 %tmp4, %tmp1 ; <i1> [#uses=1]
br i1 %tmp7, label %cond_true, label %UnifiedReturnBlock
cond_true: ; preds = %entry
%tmp10 = call i32 (...) @bar( ) ; <i32> [#uses=0]
ret void
UnifiedReturnBlock: ; preds = %entry
ret void
}
declare i32 @bar(...)