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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2010-11-22 20:31:27 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2010-11-22 20:31:27 +0000 |
| commit | 93f8455d73858c418ee7371b8e89094716df8fc7 (patch) | |
| tree | e002622a9e480dd345ee8135c7630ccbeef8f159 /lib/Target/README.txt | |
| parent | 28ef0a5719c41ed9654156aa9db7a656d020d7b5 (diff) | |
InstCombine: Implement X - A*-B -> X + A*B.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119984 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 1ec4cdf4ba9..4d5b17ab367 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1736,22 +1736,6 @@ Another similar case involves truncations on 64-bit targets: ... %367 = icmp eq i32 %362, 0 ; [#uses=1] - -//===---------------------------------------------------------------------===// - -Missed instcombine/dagcombine transformation: -define i32 @a(i32 %x, i32 %y) nounwind readnone { -entry: - %mul = mul i32 %y, -8 - %sub = sub i32 %x, %mul - ret i32 %sub -} - -Should compile to something like x+y*8, but currently compiles to an -inefficient result. Testcase derived from gcc. C testcase: - -int a(int x, int y) { return y-x*-8; } - //===---------------------------------------------------------------------===// Missed instcombine/dagcombine transformation: |