mirror of
https://github.com/c64scene-ar/llvm-6502.git
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a7be36c8eb
Making useAA() default to true for SystemZ showed that the combiner alias analysis wasn't handling volatile accesses. This hit many of the SystemZ tests, but I arbitrarily picked one for the purpose of this patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193518 91177308-0d34-0410-b5e6-96231b3b80d8
178 lines
5.4 KiB
LLVM
178 lines
5.4 KiB
LLVM
; Test 32-bit byteswaps from memory to registers.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -combiner-alias-analysis \
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; RUN: -combiner-global-alias-analysis | FileCheck %s
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declare i32 @llvm.bswap.i32(i32 %a)
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; Check LRV with no displacement.
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define i32 @f1(i32 *%src) {
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; CHECK-LABEL: f1:
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%a = load i32 *%src
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the high end of the aligned LRV range.
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define i32 @f2(i32 *%src) {
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; CHECK-LABEL: f2:
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; CHECK: lrv %r2, 524284(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32 *%src, i64 131071
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f3(i32 *%src) {
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; CHECK-LABEL: f3:
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; CHECK: agfi %r2, 524288
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32 *%src, i64 131072
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the high end of the negative aligned LRV range.
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define i32 @f4(i32 *%src) {
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; CHECK-LABEL: f4:
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; CHECK: lrv %r2, -4(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32 *%src, i64 -1
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the low end of the LRV range.
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define i32 @f5(i32 *%src) {
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; CHECK-LABEL: f5:
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; CHECK: lrv %r2, -524288(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32 *%src, i64 -131072
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f6(i32 *%src) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r2, -524292
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32 *%src, i64 -131073
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check that LRV allows an index.
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define i32 @f7(i64 %src, i64 %index) {
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; CHECK-LABEL: f7:
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; CHECK: lrv %r2, 524287({{%r3,%r2|%r2,%r3}})
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524287
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%ptr = inttoptr i64 %add2 to i32 *
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%a = load i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check that volatile accesses do not use LRV, which might access the
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; storage multple times.
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define i32 @f8(i32 *%src) {
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; CHECK-LABEL: f8:
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; CHECK: l [[REG:%r[0-5]]], 0(%r2)
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; CHECK: lrvr %r2, [[REG]]
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; CHECK: br %r14
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%a = load volatile i32 *%src
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Test a case where we spill the source of at least one LRVR. We want
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; to use LRV if possible.
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define void @f9(i32 *%ptr) {
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; CHECK-LABEL: f9:
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; CHECK: lrv {{%r[0-9]+}}, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%val0 = load volatile i32 *%ptr
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%val1 = load volatile i32 *%ptr
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%val2 = load volatile i32 *%ptr
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%val3 = load volatile i32 *%ptr
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%val4 = load volatile i32 *%ptr
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%val5 = load volatile i32 *%ptr
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%val6 = load volatile i32 *%ptr
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%val7 = load volatile i32 *%ptr
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%val8 = load volatile i32 *%ptr
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%val9 = load volatile i32 *%ptr
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%val10 = load volatile i32 *%ptr
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%val11 = load volatile i32 *%ptr
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%val12 = load volatile i32 *%ptr
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%val13 = load volatile i32 *%ptr
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%val14 = load volatile i32 *%ptr
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%val15 = load volatile i32 *%ptr
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%swapped0 = call i32 @llvm.bswap.i32(i32 %val0)
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%swapped1 = call i32 @llvm.bswap.i32(i32 %val1)
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%swapped2 = call i32 @llvm.bswap.i32(i32 %val2)
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%swapped3 = call i32 @llvm.bswap.i32(i32 %val3)
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%swapped4 = call i32 @llvm.bswap.i32(i32 %val4)
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%swapped5 = call i32 @llvm.bswap.i32(i32 %val5)
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%swapped6 = call i32 @llvm.bswap.i32(i32 %val6)
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%swapped7 = call i32 @llvm.bswap.i32(i32 %val7)
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%swapped8 = call i32 @llvm.bswap.i32(i32 %val8)
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%swapped9 = call i32 @llvm.bswap.i32(i32 %val9)
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%swapped10 = call i32 @llvm.bswap.i32(i32 %val10)
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%swapped11 = call i32 @llvm.bswap.i32(i32 %val11)
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%swapped12 = call i32 @llvm.bswap.i32(i32 %val12)
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%swapped13 = call i32 @llvm.bswap.i32(i32 %val13)
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%swapped14 = call i32 @llvm.bswap.i32(i32 %val14)
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%swapped15 = call i32 @llvm.bswap.i32(i32 %val15)
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store volatile i32 %val0, i32 *%ptr
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store volatile i32 %val1, i32 *%ptr
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store volatile i32 %val2, i32 *%ptr
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store volatile i32 %val3, i32 *%ptr
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store volatile i32 %val4, i32 *%ptr
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store volatile i32 %val5, i32 *%ptr
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store volatile i32 %val6, i32 *%ptr
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store volatile i32 %val7, i32 *%ptr
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store volatile i32 %val8, i32 *%ptr
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store volatile i32 %val9, i32 *%ptr
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store volatile i32 %val10, i32 *%ptr
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store volatile i32 %val11, i32 *%ptr
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store volatile i32 %val12, i32 *%ptr
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store volatile i32 %val13, i32 *%ptr
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store volatile i32 %val14, i32 *%ptr
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store volatile i32 %val15, i32 *%ptr
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store volatile i32 %swapped0, i32 *%ptr
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store volatile i32 %swapped1, i32 *%ptr
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store volatile i32 %swapped2, i32 *%ptr
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store volatile i32 %swapped3, i32 *%ptr
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store volatile i32 %swapped4, i32 *%ptr
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store volatile i32 %swapped5, i32 *%ptr
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store volatile i32 %swapped6, i32 *%ptr
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store volatile i32 %swapped7, i32 *%ptr
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store volatile i32 %swapped8, i32 *%ptr
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store volatile i32 %swapped9, i32 *%ptr
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store volatile i32 %swapped10, i32 *%ptr
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store volatile i32 %swapped11, i32 *%ptr
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store volatile i32 %swapped12, i32 *%ptr
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store volatile i32 %swapped13, i32 *%ptr
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store volatile i32 %swapped14, i32 *%ptr
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store volatile i32 %swapped15, i32 *%ptr
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ret void
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}
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