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| author | Michael Liao <michael.liao@intel.com> | 2013-03-28 23:38:52 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2013-03-28 23:38:52 +0000 |
| commit | 5fff5c7b2679da199bd566cd80c5d058c7fc3d86 (patch) | |
| tree | 74d2353ead4c29fcbbdb4837f0301fe06d88c012 /llvm/test | |
| parent | 4b04e66c4fd8e3b0ef37de17d7af0beb959ff349 (diff) | |
| download | bcm5719-llvm-5fff5c7b2679da199bd566cd80c5d058c7fc3d86.tar.gz bcm5719-llvm-5fff5c7b2679da199bd566cd80c5d058c7fc3d86.zip | |
Enhance boolean simplification to handle 16-/64-bit RDRAND
- RDRAND always clears the destination value when a random value is not
available (i.e. CF == 0). This value is truncated or zero-extended as
the false boolean value to be returned. Boolean simplification needs
to skip this 'zext' or 'trunc' node.
llvm-svn: 178312
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/X86/bool-simplify.ll | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/bool-simplify.ll b/llvm/test/CodeGen/X86/bool-simplify.ll index 09eb5d1038f..6d8e7fbe45e 100644 --- a/llvm/test/CodeGen/X86/bool-simplify.ll +++ b/llvm/test/CodeGen/X86/bool-simplify.ll @@ -39,7 +39,22 @@ define i32 @bax(<2 x i64> %c) { ; CHECK: ret } -define i32 @rnd(i32 %arg) nounwind uwtable { +define i16 @rnd16(i16 %arg) nounwind uwtable { + %1 = tail call { i16, i32 } @llvm.x86.rdrand.16() nounwind + %2 = extractvalue { i16, i32 } %1, 0 + %3 = extractvalue { i16, i32 } %1, 1 + %4 = icmp eq i32 %3, 0 + %5 = select i1 %4, i16 0, i16 %arg + %6 = add i16 %5, %2 + ret i16 %6 +; CHECK: rnd16 +; CHECK: rdrand +; CHECK: cmov +; CHECK-NOT: cmov +; CHECK: ret +} + +define i32 @rnd32(i32 %arg) nounwind uwtable { %1 = tail call { i32, i32 } @llvm.x86.rdrand.32() nounwind %2 = extractvalue { i32, i32 } %1, 0 %3 = extractvalue { i32, i32 } %1, 1 @@ -47,7 +62,22 @@ define i32 @rnd(i32 %arg) nounwind uwtable { %5 = select i1 %4, i32 0, i32 %arg %6 = add i32 %5, %2 ret i32 %6 -; CHECK: rnd +; CHECK: rnd32 +; CHECK: rdrand +; CHECK: cmov +; CHECK-NOT: cmov +; CHECK: ret +} + +define i64 @rnd64(i64 %arg) nounwind uwtable { + %1 = tail call { i64, i32 } @llvm.x86.rdrand.64() nounwind + %2 = extractvalue { i64, i32 } %1, 0 + %3 = extractvalue { i64, i32 } %1, 1 + %4 = icmp eq i32 %3, 0 + %5 = select i1 %4, i64 0, i64 %arg + %6 = add i64 %5, %2 + ret i64 %6 +; CHECK: rnd64 ; CHECK: rdrand ; CHECK: cmov ; CHECK-NOT: cmov @@ -55,4 +85,6 @@ define i32 @rnd(i32 %arg) nounwind uwtable { } declare i32 @llvm.x86.sse41.ptestz(<2 x i64>, <2 x i64>) nounwind readnone +declare { i16, i32 } @llvm.x86.rdrand.16() nounwind declare { i32, i32 } @llvm.x86.rdrand.32() nounwind +declare { i64, i32 } @llvm.x86.rdrand.64() nounwind |
