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author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2013-05-06 16:17:29 +0000 |
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committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2013-05-06 16:17:29 +0000 |
commit | b503b49b5105b6aad7d2a015468b84b0f64dfe8e (patch) | |
tree | a60966043fae51838cb2faa08531a7ed078e4fb6 /test/CodeGen/SystemZ/atomicrmw-sub-02.ll | |
parent | 1d09d56fe1e3f3faadd4bf4ccf3e585ddb3c3b07 (diff) | |
download | llvm-b503b49b5105b6aad7d2a015468b84b0f64dfe8e.tar.gz llvm-b503b49b5105b6aad7d2a015468b84b0f64dfe8e.tar.bz2 llvm-b503b49b5105b6aad7d2a015468b84b0f64dfe8e.tar.xz |
[SystemZ] Add CodeGen test cases
This adds all CodeGen tests for the SystemZ target.
This version of the patch incorporates feedback from a review by
Sean Silva. Thanks to all reviewers!
Patch by Richard Sandiford.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/SystemZ/atomicrmw-sub-02.ll')
-rw-r--r-- | test/CodeGen/SystemZ/atomicrmw-sub-02.ll | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/atomicrmw-sub-02.ll b/test/CodeGen/SystemZ/atomicrmw-sub-02.ll new file mode 100644 index 0000000000..449d92ff3b --- /dev/null +++ b/test/CodeGen/SystemZ/atomicrmw-sub-02.ll @@ -0,0 +1,132 @@ +; Test 16-bit atomic subtractions. +; +; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK +; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT1 +; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-SHIFT2 + +; Check subtraction of a variable. +; - CHECK is for the main loop. +; - CHECK-SHIFT1 makes sure that the negated shift count used by the second +; RLL is set up correctly. The negation is independent of the NILL and L +; tested in CHECK. +; - CHECK-SHIFT2 makes sure that %b is shifted into the high part of the word +; before being used. This shift is independent of the other loop prologue +; instructions. +define i16 @f1(i16 *%src, i16 %b) { +; CHECK: f1: +; CHECK: sllg [[SHIFT:%r[1-9]+]], %r2, 3 +; CHECK: nill %r2, 65532 +; CHECK: l [[OLD:%r[0-9]+]], 0(%r2) +; CHECK: [[LABEL:\.[^:]*]]: +; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0([[SHIFT]]) +; CHECK: sr [[ROT]], %r3 +; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0({{%r[1-9]+}}) +; CHECK: cs [[OLD]], [[NEW]], 0(%r2) +; CHECK: j{{g?}}lh [[LABEL]] +; CHECK: rll %r2, [[OLD]], 16([[SHIFT]]) +; CHECK: br %r14 +; +; CHECK-SHIFT1: f1: +; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 +; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] +; CHECK-SHIFT1: rll +; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) +; CHECK-SHIFT1: rll +; CHECK-SHIFT1: br %r14 +; +; CHECK-SHIFT2: f1: +; CHECK-SHIFT2: sll %r3, 16 +; CHECK-SHIFT2: rll +; CHECK-SHIFT2: sr {{%r[0-9]+}}, %r3 +; CHECK-SHIFT2: rll +; CHECK-SHIFT2: rll +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 %b seq_cst + ret i16 %res +} + +; Check the minimum signed value. We add 0x80000000 to the rotated word. +define i16 @f2(i16 *%src) { +; CHECK: f2: +; CHECK: sllg [[SHIFT:%r[1-9]+]], %r2, 3 +; CHECK: nill %r2, 65532 +; CHECK: l [[OLD:%r[0-9]+]], 0(%r2) +; CHECK: [[LABEL:\.[^:]*]]: +; CHECK: rll [[ROT:%r[0-9]+]], [[OLD]], 0([[SHIFT]]) +; CHECK: afi [[ROT]], -2147483648 +; CHECK: rll [[NEW:%r[0-9]+]], [[ROT]], 0([[NEGSHIFT:%r[1-9]+]]) +; CHECK: cs [[OLD]], [[NEW]], 0(%r2) +; CHECK: j{{g?}}lh [[LABEL]] +; CHECK: rll %r2, [[OLD]], 16([[SHIFT]]) +; CHECK: br %r14 +; +; CHECK-SHIFT1: f2: +; CHECK-SHIFT1: sllg [[SHIFT:%r[1-9]+]], %r2, 3 +; CHECK-SHIFT1: lcr [[NEGSHIFT:%r[1-9]+]], [[SHIFT]] +; CHECK-SHIFT1: rll +; CHECK-SHIFT1: rll {{%r[0-9]+}}, {{%r[0-9]+}}, 0([[NEGSHIFT]]) +; CHECK-SHIFT1: rll +; CHECK-SHIFT1: br %r14 +; +; CHECK-SHIFT2: f2: +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 -32768 seq_cst + ret i16 %res +} + +; Check subtraction of -1. We add 0x00010000 to the rotated word. +define i16 @f3(i16 *%src) { +; CHECK: f3: +; CHECK: afi [[ROT]], 65536 +; CHECK: br %r14 +; +; CHECK-SHIFT1: f3: +; CHECK-SHIFT1: br %r14 +; CHECK-SHIFT2: f3: +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 -1 seq_cst + ret i16 %res +} + +; Check subtraction of 1. We add 0xffff0000 to the rotated word. +define i16 @f4(i16 *%src) { +; CHECK: f4: +; CHECK: afi [[ROT]], -65536 +; CHECK: br %r14 +; +; CHECK-SHIFT1: f4: +; CHECK-SHIFT1: br %r14 +; CHECK-SHIFT2: f4: +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 1 seq_cst + ret i16 %res +} + +; Check the maximum signed value. We add 0x80010000 to the rotated word. +define i16 @f5(i16 *%src) { +; CHECK: f5: +; CHECK: afi [[ROT]], -2147418112 +; CHECK: br %r14 +; +; CHECK-SHIFT1: f5: +; CHECK-SHIFT1: br %r14 +; CHECK-SHIFT2: f5: +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 32767 seq_cst + ret i16 %res +} + +; Check subtraction of a large unsigned value. We add 0x00020000 to the +; rotated word. +define i16 @f6(i16 *%src) { +; CHECK: f6: +; CHECK: afi [[ROT]], 131072 +; CHECK: br %r14 +; +; CHECK-SHIFT1: f6: +; CHECK-SHIFT1: br %r14 +; CHECK-SHIFT2: f6: +; CHECK-SHIFT2: br %r14 + %res = atomicrmw sub i16 *%src, i16 65534 seq_cst + ret i16 %res +} |