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author | Quentin Colombet <qcolombet@apple.com> | 2014-03-26 00:10:22 +0000 |
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committer | Quentin Colombet <qcolombet@apple.com> | 2014-03-26 00:10:22 +0000 |
commit | 596516bef8425bbce7e6363d3a002e908747ec6f (patch) | |
tree | b655c07a3347b6d4cca44bc7c45d6e6dc4f3cb94 /test/CodeGen/X86/exedepsfix-broadcast.ll | |
parent | 81c66bcc13b85515db1e17c4e06034d2a2046cd1 (diff) | |
download | llvm-596516bef8425bbce7e6363d3a002e908747ec6f.tar.gz llvm-596516bef8425bbce7e6363d3a002e908747ec6f.tar.bz2 llvm-596516bef8425bbce7e6363d3a002e908747ec6f.tar.xz |
[X86] Add broadcast instructions to the table used by ExeDepsFix pass.
Adds the different broadcast instructions to the ReplaceableInstrsAVX2 table.
That way the ExeDepsFix pass can take better decisions when AVX2 broadcasts are
across domain (int <-> float).
In particular, prior to this patch we were generating:
vpbroadcastd LCPI1_0(%rip), %ymm2
vpand %ymm2, %ymm0, %ymm0
vmaxps %ymm1, %ymm0, %ymm0 ## <- domain change penalty
Now, we generate the following nice sequence where everything is in the float
domain:
vbroadcastss LCPI1_0(%rip), %ymm2
vandps %ymm2, %ymm0, %ymm0
vmaxps %ymm1, %ymm0, %ymm0
<rdar://problem/16354675>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204770 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/exedepsfix-broadcast.ll')
-rw-r--r-- | test/CodeGen/X86/exedepsfix-broadcast.ll | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/test/CodeGen/X86/exedepsfix-broadcast.ll b/test/CodeGen/X86/exedepsfix-broadcast.ll new file mode 100644 index 0000000000..a18f751956 --- /dev/null +++ b/test/CodeGen/X86/exedepsfix-broadcast.ll @@ -0,0 +1,128 @@ +; RUN: llc -O3 -mtriple=x86_64-apple-macosx -o - < %s -mattr=+avx2 -enable-unsafe-fp-math -mcpu=core2 | FileCheck %s +; Check that the ExeDepsFix pass correctly fixes the domain for broadcast instructions. +; <rdar://problem/16354675> + +; CHECK-LABEL: ExeDepsFix_broadcastss +; CHECK: broadcastss +; CHECK: vandps +; CHECK: vmaxps +; CHECK: ret +define <4 x float> @ExeDepsFix_broadcastss(<4 x float> %arg, <4 x float> %arg2) { + %bitcast = bitcast <4 x float> %arg to <4 x i32> + %and = and <4 x i32> %bitcast, <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647> + %floatcast = bitcast <4 x i32> %and to <4 x float> + %max_is_x = fcmp oge <4 x float> %floatcast, %arg2 + %max = select <4 x i1> %max_is_x, <4 x float> %floatcast, <4 x float> %arg2 + ret <4 x float> %max +} + +; CHECK-LABEL: ExeDepsFix_broadcastss256 +; CHECK: broadcastss +; CHECK: vandps +; CHECK: vmaxps +; CHECK: ret +define <8 x float> @ExeDepsFix_broadcastss256(<8 x float> %arg, <8 x float> %arg2) { + %bitcast = bitcast <8 x float> %arg to <8 x i32> + %and = and <8 x i32> %bitcast, <i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647, i32 2147483647> + %floatcast = bitcast <8 x i32> %and to <8 x float> + %max_is_x = fcmp oge <8 x float> %floatcast, %arg2 + %max = select <8 x i1> %max_is_x, <8 x float> %floatcast, <8 x float> %arg2 + ret <8 x float> %max +} + + +; CHECK-LABEL: ExeDepsFix_broadcastss_inreg +; CHECK: broadcastss +; CHECK: vandps +; CHECK: vmaxps +; CHECK: ret +define <4 x float> @ExeDepsFix_broadcastss_inreg(<4 x float> %arg, <4 x float> %arg2, i32 %broadcastvalue) { + %bitcast = bitcast <4 x float> %arg to <4 x i32> + %in = insertelement <4 x i32> undef, i32 %broadcastvalue, i32 0 + %mask = shufflevector <4 x i32> %in, <4 x i32> undef, <4 x i32> zeroinitializer + %and = and <4 x i32> %bitcast, %mask + %floatcast = bitcast <4 x i32> %and to <4 x float> + %max_is_x = fcmp oge <4 x float> %floatcast, %arg2 + %max = select <4 x i1> %max_is_x, <4 x float> %floatcast, <4 x float> %arg2 + ret <4 x float> %max +} + +; CHECK-LABEL: ExeDepsFix_broadcastss256_inreg +; CHECK: broadcastss +; CHECK: vandps +; CHECK: vmaxps +; CHECK: ret +define <8 x float> @ExeDepsFix_broadcastss256_inreg(<8 x float> %arg, <8 x float> %arg2, i32 %broadcastvalue) { + %bitcast = bitcast <8 x float> %arg to <8 x i32> + %in = insertelement <8 x i32> undef, i32 %broadcastvalue, i32 0 + %mask = shufflevector <8 x i32> %in, <8 x i32> undef, <8 x i32> zeroinitializer + %and = and <8 x i32> %bitcast, %mask + %floatcast = bitcast <8 x i32> %and to <8 x float> + %max_is_x = fcmp oge <8 x float> %floatcast, %arg2 + %max = select <8 x i1> %max_is_x, <8 x float> %floatcast, <8 x float> %arg2 + ret <8 x float> %max +} + +; CHECK-LABEL: ExeDepsFix_broadcastsd +; In that case the broadcast is directly folded into vandpd. +; CHECK: vandpd +; CHECK: vmaxpd +; CHECK:ret +define <2 x double> @ExeDepsFix_broadcastsd(<2 x double> %arg, <2 x double> %arg2) { + %bitcast = bitcast <2 x double> %arg to <2 x i64> + %and = and <2 x i64> %bitcast, <i64 2147483647, i64 2147483647> + %floatcast = bitcast <2 x i64> %and to <2 x double> + %max_is_x = fcmp oge <2 x double> %floatcast, %arg2 + %max = select <2 x i1> %max_is_x, <2 x double> %floatcast, <2 x double> %arg2 + ret <2 x double> %max +} + +; CHECK-LABEL: ExeDepsFix_broadcastsd256 +; CHECK: broadcastsd +; CHECK: vandpd +; CHECK: vmaxpd +; CHECK: ret +define <4 x double> @ExeDepsFix_broadcastsd256(<4 x double> %arg, <4 x double> %arg2) { + %bitcast = bitcast <4 x double> %arg to <4 x i64> + %and = and <4 x i64> %bitcast, <i64 2147483647, i64 2147483647, i64 2147483647, i64 2147483647> + %floatcast = bitcast <4 x i64> %and to <4 x double> + %max_is_x = fcmp oge <4 x double> %floatcast, %arg2 + %max = select <4 x i1> %max_is_x, <4 x double> %floatcast, <4 x double> %arg2 + ret <4 x double> %max +} + + +; CHECK-LABEL: ExeDepsFix_broadcastsd_inreg +; ExeDepsFix works top down, thus it coalesces vmovlhps domain with +; vandps and there is nothing more you can do to match vmaxpd. +; CHECK: vmovlhps +; CHECK: vandps +; CHECK: vmaxpd +; CHECK: ret +define <2 x double> @ExeDepsFix_broadcastsd_inreg(<2 x double> %arg, <2 x double> %arg2, i64 %broadcastvalue) { + %bitcast = bitcast <2 x double> %arg to <2 x i64> + %in = insertelement <2 x i64> undef, i64 %broadcastvalue, i32 0 + %mask = shufflevector <2 x i64> %in, <2 x i64> undef, <2 x i32> zeroinitializer + %and = and <2 x i64> %bitcast, %mask + %floatcast = bitcast <2 x i64> %and to <2 x double> + %max_is_x = fcmp oge <2 x double> %floatcast, %arg2 + %max = select <2 x i1> %max_is_x, <2 x double> %floatcast, <2 x double> %arg2 + ret <2 x double> %max +} + +; CHECK-LABEL: ExeDepsFix_broadcastsd256_inreg +; CHECK: broadcastsd +; CHECK: vandpd +; CHECK: vmaxpd +; CHECK: ret +define <4 x double> @ExeDepsFix_broadcastsd256_inreg(<4 x double> %arg, <4 x double> %arg2, i64 %broadcastvalue) { + %bitcast = bitcast <4 x double> %arg to <4 x i64> + %in = insertelement <4 x i64> undef, i64 %broadcastvalue, i32 0 + %mask = shufflevector <4 x i64> %in, <4 x i64> undef, <4 x i32> zeroinitializer + %and = and <4 x i64> %bitcast, %mask + %floatcast = bitcast <4 x i64> %and to <4 x double> + %max_is_x = fcmp oge <4 x double> %floatcast, %arg2 + %max = select <4 x i1> %max_is_x, <4 x double> %floatcast, <4 x double> %arg2 + ret <4 x double> %max +} + |