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FileCheckize. 

llvm-svn: 130613
This commit is contained in:
Benjamin Kramer 2011-04-30 18:15:53 +00:00
parent 85894a8f85
commit 6a50bbd284
1 changed files with 30 additions and 1 deletions
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31
llvm/test/Transforms/InstCombine/div.ll
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@ -1,34 +1,44 @@
; This test makes sure that div instructions are properly eliminated.
; RUN: opt < %s -instcombine -S | not grep div
; RUN: opt < %s -instcombine -S | FileCheck %s
define i32 @test1(i32 %A) {
%B = sdiv i32 %A, 1 ; <i32> [#uses=1]
ret i32 %B
; CHECK: @test1
; CHECK-NEXT: ret i32 %A
}
define i32 @test2(i32 %A) {
; => Shift
%B = udiv i32 %A, 8 ; <i32> [#uses=1]
ret i32 %B
; CHECK: @test2
; CHECK-NEXT: lshr i32 %A, 3
}
define i32 @test3(i32 %A) {
; => 0, don't need to keep traps
%B = sdiv i32 0, %A ; <i32> [#uses=1]
ret i32 %B
; CHECK: @test3
; CHECK-NEXT: ret i32 0
}
define i32 @test4(i32 %A) {
; 0-A
%B = sdiv i32 %A, -1 ; <i32> [#uses=1]
ret i32 %B
; CHECK: @test4
; CHECK-NEXT: sub i32 0, %A
}
define i32 @test5(i32 %A) {
%B = udiv i32 %A, -16 ; <i32> [#uses=1]
%C = udiv i32 %B, -4 ; <i32> [#uses=1]
ret i32 %C
; CHECK: @test5
; CHECK-NEXT: ret i32 0
}
define i1 @test6(i32 %A) {
@ -36,6 +46,8 @@ define i1 @test6(i32 %A) {
; A < 123
%C = icmp eq i32 %B, 0 ; <i1> [#uses=1]
ret i1 %C
; CHECK: @test6
; CHECK-NEXT: icmp ult i32 %A, 123
}
define i1 @test7(i32 %A) {
@ -43,6 +55,9 @@ define i1 @test7(i32 %A) {
; A >= 20 && A < 30
%C = icmp eq i32 %B, 2 ; <i1> [#uses=1]
ret i1 %C
; CHECK: @test7
; CHECK-NEXT: add i32 %A, -20
; CHECK-NEXT: icmp ult i32
}
define i1 @test8(i8 %A) {
@ -50,6 +65,8 @@ define i1 @test8(i8 %A) {
; A >= 246
%C = icmp eq i8 %B, 2 ; <i1> [#uses=1]
ret i1 %C
; CHECK: @test8
; CHECK-NEXT: icmp ugt i8 %A, -11
}
define i1 @test9(i8 %A) {
@ -57,28 +74,40 @@ define i1 @test9(i8 %A) {
; A < 246
%C = icmp ne i8 %B, 2 ; <i1> [#uses=1]
ret i1 %C
; CHECK: @test9
; CHECK-NEXT: icmp ult i8 %A, -10
}
define i32 @test10(i32 %X, i1 %C) {
%V = select i1 %C, i32 64, i32 8 ; <i32> [#uses=1]
%R = udiv i32 %X, %V ; <i32> [#uses=1]
ret i32 %R
; CHECK: @test10
; CHECK-NEXT: select i1 %C, i32 6, i32 3
; CHECK-NEXT: lshr i32 %X
}
define i32 @test11(i32 %X, i1 %C) {
%A = select i1 %C, i32 1024, i32 32 ; <i32> [#uses=1]
%B = udiv i32 %X, %A ; <i32> [#uses=1]
ret i32 %B
; CHECK: @test11
; CHECK-NEXT: select i1 %C, i32 10, i32 5
; CHECK-NEXT: lshr i32 %X
}
; PR2328
define i32 @test12(i32 %x) nounwind {
%tmp3 = udiv i32 %x, %x ; 1
ret i32 %tmp3
; CHECK: @test12
; CHECK-NEXT: ret i32 1
}
define i32 @test13(i32 %x) nounwind {
%tmp3 = sdiv i32 %x, %x ; 1
ret i32 %tmp3
; CHECK: @test13
; CHECK-NEXT: ret i32 1
}