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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275685 91177308-0d34-0410-b5e6-96231b3b80d8
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Sanjay Patel 2016-07-16 16:24:06 +00:00
parent 05d1283c18
commit 2913e8c9be
1 changed files with 47 additions and 42 deletions
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89
test/Transforms/InstCombine/cast-set.ll
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@ -1,72 +1,77 @@
; This tests for various complex cast elimination cases instcombine should
; handle.
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
; RUN: opt < %s -instcombine -S | FileCheck %s
define i1 @test1(i32 %X) {
%A = bitcast i32 %X to i32 ; <i32> [#uses=1]
; Convert to setne int %X, 12
%c = icmp ne i32 %A, 12 ; <i1> [#uses=1]
ret i1 %c
; CHECK-LABEL: @test1(
; CHECK: %c = icmp ne i32 %X, 12
; CHECK: ret i1 %c
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 %X, 12
; CHECK-NEXT: ret i1 [[C]]
;
%A = bitcast i32 %X to i32
; Convert to setne int %X, 12
%c = icmp ne i32 %A, 12
ret i1 %c
}
define i1 @test2(i32 %X, i32 %Y) {
%A = bitcast i32 %X to i32 ; <i32> [#uses=1]
%B = bitcast i32 %Y to i32 ; <i32> [#uses=1]
; Convert to setne int %X, %Y
%c = icmp ne i32 %A, %B ; <i1> [#uses=1]
ret i1 %c
; CHECK-LABEL: @test2(
; CHECK: %c = icmp ne i32 %X, %Y
; CHECK: ret i1 %c
; CHECK-NEXT: [[C:%.*]] = icmp ne i32 %X, %Y
; CHECK-NEXT: ret i1 [[C]]
;
%A = bitcast i32 %X to i32
%B = bitcast i32 %Y to i32
; Convert to setne int %X, %Y
%c = icmp ne i32 %A, %B
ret i1 %c
}
define i32 @test4(i32 %A) {
%B = bitcast i32 %A to i32 ; <i32> [#uses=1]
%C = shl i32 %B, 2 ; <i32> [#uses=1]
%D = bitcast i32 %C to i32 ; <i32> [#uses=1]
ret i32 %D
; CHECK-LABEL: @test4(
; CHECK: %C = shl i32 %A, 2
; CHECK: ret i32 %C
; CHECK-NEXT: [[C:%.*]] = shl i32 %A, 2
; CHECK-NEXT: ret i32 [[C]]
;
%B = bitcast i32 %A to i32
%C = shl i32 %B, 2
%D = bitcast i32 %C to i32
ret i32 %D
}
define i16 @test5(i16 %A) {
%B = sext i16 %A to i32 ; <i32> [#uses=1]
%C = and i32 %B, 15 ; <i32> [#uses=1]
%D = trunc i32 %C to i16 ; <i16> [#uses=1]
ret i16 %D
; CHECK-LABEL: @test5(
; CHECK: %C = and i16 %A, 15
; CHECK: ret i16 %C
; CHECK-NEXT: [[C:%.*]] = and i16 %A, 15
; CHECK-NEXT: ret i16 [[C]]
;
%B = sext i16 %A to i32
%C = and i32 %B, 15
%D = trunc i32 %C to i16
ret i16 %D
}
define i1 @test6(i1 %A) {
%B = zext i1 %A to i32 ; <i32> [#uses=1]
%C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
ret i1 %C
; CHECK-LABEL: @test6(
; CHECK: ret i1 %A
; CHECK-NEXT: ret i1 %A
;
%B = zext i1 %A to i32
%C = icmp ne i32 %B, 0
ret i1 %C
}
define i1 @test6a(i1 %A) {
%B = zext i1 %A to i32 ; <i32> [#uses=1]
%C = icmp ne i32 %B, -1 ; <i1> [#uses=1]
ret i1 %C
; CHECK-LABEL: @test6a(
; CHECK: ret i1 true
; CHECK-NEXT: ret i1 true
;
%B = zext i1 %A to i32
%C = icmp ne i32 %B, -1
ret i1 %C
}
define i1 @test7(i8* %A) {
%B = bitcast i8* %A to i32* ; <i32*> [#uses=1]
%C = icmp eq i32* %B, null ; <i1> [#uses=1]
ret i1 %C
; CHECK-LABEL: @test7(
; CHECK: %C = icmp eq i8* %A, null
; CHECK: ret i1 %C
; CHECK-NEXT: [[C:%.*]] = icmp eq i8* %A, null
; CHECK-NEXT: ret i1 [[C]]
;
%B = bitcast i8* %A to i32*
%C = icmp eq i32* %B, null
ret i1 %C
}