llvm/test/Transforms/InstCombine/pr21651.ll
Sanjay Patel 86ef16a761 [InstCombine] shrink switch conditions better (PR24766)
https://llvm.org/bugs/show_bug.cgi?id=24766#c2

This removes a hack that was added for the benefit of x86 codegen. 
It prevented shrinking the switch condition even to smaller legal (DataLayout) types.
We have a safety mechanism in CGP after:
http://reviews.llvm.org/rL251857
...so we're free to use the optimal (smallest) IR type now.

Differential Revision: http://reviews.llvm.org/D12965



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274233 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-30 14:51:21 +00:00

25 lines
517 B
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; Provide legal integer types.
target datalayout = "n8:16:32:64"
define void @PR21651() {
; CHECK-LABEL: @PR21651(
; CHECK-NEXT: switch i1 false, label %out [
; CHECK-NEXT: i1 false, label %out
; CHECK-NEXT: i1 true, label %out
; CHECK-NEXT: ]
; CHECK: out:
; CHECK-NEXT: ret void
;
switch i2 0, label %out [
i2 0, label %out
i2 1, label %out
]
out:
ret void
}