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Diffstat (limited to 'test/CodeGen/SystemZ/int-sub-09.ll')
| -rw-r--r-- | test/CodeGen/SystemZ/int-sub-09.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-sub-09.ll b/test/CodeGen/SystemZ/int-sub-09.ll new file mode 100644 index 0000000..00a60d3 --- /dev/null +++ b/test/CodeGen/SystemZ/int-sub-09.ll @@ -0,0 +1,22 @@ +; Test 128-bit subtraction when the distinct-operands facility is available. +; +; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s + +; Test the case where both operands are in registers. +define i64 @f1(i64 %a, i64 %b, i64 %c, i64 %d, i64 *%ptr) { +; CHECK-LABEL: f1: +; CHECK: slgrk %r2, %r4, %r5 +; CHECK: slbgr +; CHECK: br %r14 + %x1 = insertelement <2 x i64> undef, i64 %b, i32 0 + %x2 = insertelement <2 x i64> %x1, i64 %c, i32 1 + %x = bitcast <2 x i64> %x2 to i128 + %y2 = insertelement <2 x i64> %x1, i64 %d, i32 1 + %y = bitcast <2 x i64> %y2 to i128 + %sub = sub i128 %x, %y + %subv = bitcast i128 %sub to <2 x i64> + %high = extractelement <2 x i64> %subv, i32 0 + store i64 %high, i64 *%ptr + %low = extractelement <2 x i64> %subv, i32 1 + ret i64 %low +} |