mirror of
https://github.com/c64scene-ar/llvm-6502.git
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We are going to drop debug info without a version number or with a different version number, to make sure we don't crash when we see bitcode files with different debug info metadata format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195504 91177308-0d34-0410-b5e6-96231b3b80d8
262 lines
8.5 KiB
LLVM
262 lines
8.5 KiB
LLVM
; RUN: opt -S -dse < %s | FileCheck %s
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; If there are two stores to the same location, DSE should be able to remove
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; the first store if the two stores are separated by no more than 98
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; instructions. The existence of debug intrinsics between the stores should
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; not affect this instruction limit.
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@x = global i32 0, align 4
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; Function Attrs: nounwind
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define i32 @test_within_limit() {
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entry:
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; The first store; later there is a second store to the same location,
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; so this store should be optimized away by DSE.
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; CHECK-NOT: store i32 1, i32* @x, align 4
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store i32 1, i32* @x, align 4
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; Insert 98 dummy instructions between the two stores
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%0 = bitcast i32 0 to i32
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%1 = bitcast i32 0 to i32
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%2 = bitcast i32 0 to i32
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%3 = bitcast i32 0 to i32
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%4 = bitcast i32 0 to i32
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%5 = bitcast i32 0 to i32
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%6 = bitcast i32 0 to i32
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%7 = bitcast i32 0 to i32
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%8 = bitcast i32 0 to i32
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%9 = bitcast i32 0 to i32
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%10 = bitcast i32 0 to i32
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%11 = bitcast i32 0 to i32
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%12 = bitcast i32 0 to i32
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%13 = bitcast i32 0 to i32
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%14 = bitcast i32 0 to i32
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%15 = bitcast i32 0 to i32
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%16 = bitcast i32 0 to i32
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%17 = bitcast i32 0 to i32
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%18 = bitcast i32 0 to i32
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%19 = bitcast i32 0 to i32
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%20 = bitcast i32 0 to i32
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%21 = bitcast i32 0 to i32
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%22 = bitcast i32 0 to i32
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%23 = bitcast i32 0 to i32
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%24 = bitcast i32 0 to i32
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%25 = bitcast i32 0 to i32
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%26 = bitcast i32 0 to i32
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%27 = bitcast i32 0 to i32
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%28 = bitcast i32 0 to i32
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%29 = bitcast i32 0 to i32
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%30 = bitcast i32 0 to i32
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%31 = bitcast i32 0 to i32
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%32 = bitcast i32 0 to i32
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%33 = bitcast i32 0 to i32
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%34 = bitcast i32 0 to i32
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%35 = bitcast i32 0 to i32
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%36 = bitcast i32 0 to i32
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%37 = bitcast i32 0 to i32
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%38 = bitcast i32 0 to i32
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%39 = bitcast i32 0 to i32
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%40 = bitcast i32 0 to i32
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%41 = bitcast i32 0 to i32
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%42 = bitcast i32 0 to i32
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%43 = bitcast i32 0 to i32
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%44 = bitcast i32 0 to i32
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%45 = bitcast i32 0 to i32
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%46 = bitcast i32 0 to i32
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%47 = bitcast i32 0 to i32
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%48 = bitcast i32 0 to i32
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%49 = bitcast i32 0 to i32
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%50 = bitcast i32 0 to i32
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%51 = bitcast i32 0 to i32
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%52 = bitcast i32 0 to i32
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%53 = bitcast i32 0 to i32
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%54 = bitcast i32 0 to i32
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%55 = bitcast i32 0 to i32
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%56 = bitcast i32 0 to i32
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%57 = bitcast i32 0 to i32
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%58 = bitcast i32 0 to i32
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%59 = bitcast i32 0 to i32
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%60 = bitcast i32 0 to i32
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%61 = bitcast i32 0 to i32
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%62 = bitcast i32 0 to i32
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%63 = bitcast i32 0 to i32
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%64 = bitcast i32 0 to i32
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%65 = bitcast i32 0 to i32
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%66 = bitcast i32 0 to i32
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%67 = bitcast i32 0 to i32
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%68 = bitcast i32 0 to i32
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%69 = bitcast i32 0 to i32
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%70 = bitcast i32 0 to i32
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%71 = bitcast i32 0 to i32
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%72 = bitcast i32 0 to i32
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%73 = bitcast i32 0 to i32
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%74 = bitcast i32 0 to i32
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%75 = bitcast i32 0 to i32
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%76 = bitcast i32 0 to i32
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%77 = bitcast i32 0 to i32
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%78 = bitcast i32 0 to i32
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%79 = bitcast i32 0 to i32
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%80 = bitcast i32 0 to i32
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%81 = bitcast i32 0 to i32
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%82 = bitcast i32 0 to i32
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%83 = bitcast i32 0 to i32
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%84 = bitcast i32 0 to i32
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%85 = bitcast i32 0 to i32
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%86 = bitcast i32 0 to i32
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%87 = bitcast i32 0 to i32
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%88 = bitcast i32 0 to i32
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%89 = bitcast i32 0 to i32
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%90 = bitcast i32 0 to i32
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%91 = bitcast i32 0 to i32
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%92 = bitcast i32 0 to i32
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%93 = bitcast i32 0 to i32
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%94 = bitcast i32 0 to i32
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%95 = bitcast i32 0 to i32
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%96 = bitcast i32 0 to i32
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%97 = bitcast i32 0 to i32
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; Insert a meaningless dbg.value intrinsic; it should have no
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; effect on the working of DSE in any way.
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call void @llvm.dbg.value(metadata !12, i64 0, metadata !10)
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; CHECK: store i32 -1, i32* @x, align 4
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store i32 -1, i32* @x, align 4
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ret i32 0
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}
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; Function Attrs: nounwind
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define i32 @test_outside_limit() {
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entry:
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; The first store; later there is a second store to the same location
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; CHECK: store i32 1, i32* @x, align 4
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store i32 1, i32* @x, align 4
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; Insert 99 dummy instructions between the two stores; this is
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; one too many instruction for the DSE to take place.
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%0 = bitcast i32 0 to i32
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%1 = bitcast i32 0 to i32
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%2 = bitcast i32 0 to i32
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%3 = bitcast i32 0 to i32
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%4 = bitcast i32 0 to i32
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%5 = bitcast i32 0 to i32
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%6 = bitcast i32 0 to i32
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%7 = bitcast i32 0 to i32
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%8 = bitcast i32 0 to i32
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%9 = bitcast i32 0 to i32
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%10 = bitcast i32 0 to i32
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%11 = bitcast i32 0 to i32
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%12 = bitcast i32 0 to i32
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%13 = bitcast i32 0 to i32
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%14 = bitcast i32 0 to i32
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%15 = bitcast i32 0 to i32
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%16 = bitcast i32 0 to i32
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%17 = bitcast i32 0 to i32
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%18 = bitcast i32 0 to i32
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%19 = bitcast i32 0 to i32
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%20 = bitcast i32 0 to i32
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%21 = bitcast i32 0 to i32
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%22 = bitcast i32 0 to i32
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%23 = bitcast i32 0 to i32
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%24 = bitcast i32 0 to i32
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%25 = bitcast i32 0 to i32
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%26 = bitcast i32 0 to i32
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%27 = bitcast i32 0 to i32
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%28 = bitcast i32 0 to i32
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%29 = bitcast i32 0 to i32
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%30 = bitcast i32 0 to i32
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%31 = bitcast i32 0 to i32
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%32 = bitcast i32 0 to i32
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%33 = bitcast i32 0 to i32
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%34 = bitcast i32 0 to i32
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%35 = bitcast i32 0 to i32
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%36 = bitcast i32 0 to i32
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%37 = bitcast i32 0 to i32
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%38 = bitcast i32 0 to i32
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%39 = bitcast i32 0 to i32
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%40 = bitcast i32 0 to i32
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%41 = bitcast i32 0 to i32
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%42 = bitcast i32 0 to i32
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%43 = bitcast i32 0 to i32
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%44 = bitcast i32 0 to i32
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%45 = bitcast i32 0 to i32
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%46 = bitcast i32 0 to i32
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%47 = bitcast i32 0 to i32
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%48 = bitcast i32 0 to i32
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%49 = bitcast i32 0 to i32
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%50 = bitcast i32 0 to i32
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%51 = bitcast i32 0 to i32
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%52 = bitcast i32 0 to i32
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%53 = bitcast i32 0 to i32
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%54 = bitcast i32 0 to i32
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%55 = bitcast i32 0 to i32
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%56 = bitcast i32 0 to i32
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%57 = bitcast i32 0 to i32
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%58 = bitcast i32 0 to i32
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%59 = bitcast i32 0 to i32
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%60 = bitcast i32 0 to i32
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%61 = bitcast i32 0 to i32
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%62 = bitcast i32 0 to i32
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%63 = bitcast i32 0 to i32
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%64 = bitcast i32 0 to i32
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%65 = bitcast i32 0 to i32
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%66 = bitcast i32 0 to i32
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%67 = bitcast i32 0 to i32
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%68 = bitcast i32 0 to i32
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%69 = bitcast i32 0 to i32
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%70 = bitcast i32 0 to i32
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%71 = bitcast i32 0 to i32
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%72 = bitcast i32 0 to i32
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%73 = bitcast i32 0 to i32
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%74 = bitcast i32 0 to i32
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%75 = bitcast i32 0 to i32
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%76 = bitcast i32 0 to i32
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%77 = bitcast i32 0 to i32
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%78 = bitcast i32 0 to i32
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%79 = bitcast i32 0 to i32
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%80 = bitcast i32 0 to i32
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%81 = bitcast i32 0 to i32
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%82 = bitcast i32 0 to i32
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%83 = bitcast i32 0 to i32
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%84 = bitcast i32 0 to i32
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%85 = bitcast i32 0 to i32
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%86 = bitcast i32 0 to i32
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%87 = bitcast i32 0 to i32
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%88 = bitcast i32 0 to i32
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%89 = bitcast i32 0 to i32
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%90 = bitcast i32 0 to i32
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%91 = bitcast i32 0 to i32
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%92 = bitcast i32 0 to i32
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%93 = bitcast i32 0 to i32
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%94 = bitcast i32 0 to i32
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%95 = bitcast i32 0 to i32
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%96 = bitcast i32 0 to i32
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%97 = bitcast i32 0 to i32
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%98 = bitcast i32 0 to i32
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; CHECK: store i32 -1, i32* @x, align 4
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store i32 -1, i32* @x, align 4
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ret i32 0
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!11, !13}
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!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !9, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/home/tmp/test.c] [DW_LANG_C99]
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!1 = metadata !{metadata !"test.c", metadata !"/home/tmp"}
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!2 = metadata !{i32 0}
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!3 = metadata !{metadata !4}
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!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"test_within_limit", metadata !"test_within_limit", metadata !"", i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @test_within_limit, null, null, metadata !2, i32 4} ; [ DW_TAG_subprogram ] [line 3] [def] [scope 4] [test]
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!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/home/tmp/test.c]
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!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = metadata !{metadata !8}
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!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!9 = metadata !{metadata !10}
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!10 = metadata !{i32 786484, i32 0, null, metadata !"x", metadata !"x", metadata !"", metadata !5, i32 1, metadata !8, i32 0, i32 1, i32* @x, null} ; [ DW_TAG_variable ] [x] [line 1] [def]
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!11 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!12 = metadata !{i32* undef}
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!13 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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