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| author | Evan Cheng <evan.cheng@apple.com> | 2009-03-23 07:19:58 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-03-23 07:19:58 +0000 |
| commit | 7d6d4b360fb8c1895b57eeb1284e792f953ea7ee (patch) | |
| tree | 418af119ada84a281c17a9346f9183361e6fdec1 /test/CodeGen | |
| parent | a8bd27ff666a0c5f7248f01670f0f53887359086 (diff) | |
| download | external_llvm-7d6d4b360fb8c1895b57eeb1284e792f953ea7ee.zip external_llvm-7d6d4b360fb8c1895b57eeb1284e792f953ea7ee.tar.gz external_llvm-7d6d4b360fb8c1895b57eeb1284e792f953ea7ee.tar.bz2 | |
Do not fold away subreg_to_reg if the source register has a sub-register index. That means the source register is taking a sub-register of a larger register. e.g. On x86
%RAX<def> = ...
%RAX<def> = SUBREG_TO_REG 0, %EAX:3<kill>, 3
The first def is defining RAX, not EAX so the top bits were not zero-extended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67511 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/subreg-to-reg-2.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/X86/subreg-to-reg-2.ll b/test/CodeGen/X86/subreg-to-reg-2.ll new file mode 100644 index 0000000..d0b40cd --- /dev/null +++ b/test/CodeGen/X86/subreg-to-reg-2.ll @@ -0,0 +1,25 @@ +; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin | grep movl +; rdar://6707985 + + %XXOO = type { %"struct.XXC::XXCC", i8*, %"struct.XXC::XXOO::$_71" } + %XXValue = type opaque + %"struct.XXC::ArrayStorage" = type { i32, i32, i32, i8*, i8*, [1 x %XXValue*] } + %"struct.XXC::XXArray" = type { %XXOO, i32, %"struct.XXC::ArrayStorage"* } + %"struct.XXC::XXCC" = type { i32 (...)**, i8* } + %"struct.XXC::XXOO::$_71" = type { [2 x %XXValue*] } + +define internal fastcc %XXValue* @t(i64* %out, %"struct.XXC::ArrayStorage"* %tmp9) nounwind { +prologue: + %array = load %XXValue** inttoptr (i64 11111111 to %XXValue**) ; <%XXValue*> [#uses=0] + %index = load %XXValue** inttoptr (i64 22222222 to %XXValue**) ; <%XXValue*> [#uses=1] + %tmp = ptrtoint %XXValue* %index to i64 ; <i64> [#uses=2] + store i64 %tmp, i64* %out + %tmp6 = trunc i64 %tmp to i32 ; <i32> [#uses=1] + br label %bb5 + +bb5: ; preds = %prologue + %tmp10 = zext i32 %tmp6 to i64 ; <i64> [#uses=1] + %tmp11 = getelementptr %"struct.XXC::ArrayStorage"* %tmp9, i64 0, i32 5, i64 %tmp10 ; <%XXValue**> [#uses=1] + %tmp12 = load %XXValue** %tmp11, align 8 ; <%XXValue*> [#uses=1] + ret %XXValue* %tmp12 +} |