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1. modernize the constantmerge pass, using densemap/smallvector.

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2. don't bother trying to merge globals in non-default sections,
   doing so is quite dubious at best anyway.
3. fix a bug reported by Arnaud de Grandmaison where we'd try to
   merge two globals in different address spaces.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95995 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-02-12 18:17:23 +00:00
parent 4b2657a404
commit c3b6ffc431
2 changed files with 44 additions and 27 deletions
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34
test/Transforms/ConstantMerge/dont-merge.ll
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@@ -1,16 +1,30 @@
; RUN: opt < %s -constmerge -S | grep foo
; RUN: opt < %s -constmerge -S | grep bar
; RUN: opt < %s -constmerge -S | FileCheck %s
; Don't merge constants in different sections.
; Don't merge constants with specified sections.
@G1 = internal constant i32 1, section "foo" ; <i32*> [#uses=1]
@G2 = internal constant i32 1, section "bar" ; <i32*> [#uses=1]
@G3 = internal constant i32 1, section "bar" ; <i32*> [#uses=1]
@T1G1 = internal constant i32 1, section "foo"
@T1G2 = internal constant i32 1, section "bar"
@T1G3 = internal constant i32 1, section "bar"
define void @test(i32** %P1, i32** %P2, i32** %P3) {
store i32* @G1, i32** %P1
store i32* @G2, i32** %P2
store i32* @G3, i32** %P3
; CHECK: @T1G1
; CHECK: @T1G2
; CHECK: @T1G3
define void @test1(i32** %P1, i32** %P2, i32** %P3) {
store i32* @T1G1, i32** %P1
store i32* @T1G2, i32** %P2
store i32* @T1G3, i32** %P3
ret void
}
@T2a = internal constant i32 224
@T2b = internal addrspace(30) constant i32 224
; CHECK: @T2a
; CHECK: @T2b
define void @test2(i32** %P1, i32 addrspace(30)** %P2) {
store i32* @T2a, i32** %P1
store i32 addrspace(30)* @T2b, i32 addrspace(30)** %P2
ret void
}