mirror of
https://github.com/c64scene-ar/llvm-6502.git
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55ec2218c4
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186163 91177308-0d34-0410-b5e6-96231b3b80d8
179 lines
5.1 KiB
LLVM
179 lines
5.1 KiB
LLVM
; RUN: llc < %s -mtriple=armv6-linux-gnueabi -arm-tail-calls | FileCheck %s -check-prefix=CHECKELF
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; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D
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declare i16 @identity16(i16 returned %x)
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declare i32 @identity32(i32 returned %x)
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declare zeroext i16 @retzext16(i16 returned %x)
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declare i16 @paramzext16(i16 zeroext returned %x)
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declare zeroext i16 @bothzext16(i16 zeroext returned %x)
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; The zeroext param attribute below is meant to have no effect
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define i16 @test_identity(i16 zeroext %x) {
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entry:
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; CHECKELF-LABEL: test_identity:
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; CHECKELF: mov [[SAVEX:r[0-9]+]], r0
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; CHECKELF: bl identity16
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; CHECKELF: uxth r0, r0
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; CHECKELF: bl identity32
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; CHECKELF: mov r0, [[SAVEX]]
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; CHECKT2D-LABEL: test_identity:
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; CHECKT2D: mov [[SAVEX:r[0-9]+]], r0
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; CHECKT2D: blx _identity16
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; CHECKT2D: uxth r0, r0
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; CHECKT2D: blx _identity32
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; CHECKT2D: mov r0, [[SAVEX]]
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%call = tail call i16 @identity16(i16 %x)
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%b = zext i16 %call to i32
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%call2 = tail call i32 @identity32(i32 %b)
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ret i16 %x
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}
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; FIXME: This ought not to require register saving but currently does because
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; x is not considered equal to %call (see SelectionDAGBuilder.cpp)
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define i16 @test_matched_ret(i16 %x) {
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entry:
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; CHECKELF-LABEL: test_matched_ret:
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; This shouldn't be required
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; CHECKELF: mov [[SAVEX:r[0-9]+]], r0
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; CHECKELF: bl retzext16
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; CHECKELF-NOT: uxth r0, {{r[0-9]+}}
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; CHECKELF: bl identity32
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; This shouldn't be required
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; CHECKELF: mov r0, [[SAVEX]]
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; CHECKT2D-LABEL: test_matched_ret:
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; This shouldn't be required
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; CHECKT2D: mov [[SAVEX:r[0-9]+]], r0
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; CHECKT2D: blx _retzext16
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; CHECKT2D-NOT: uxth r0, {{r[0-9]+}}
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; CHECKT2D: blx _identity32
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; This shouldn't be required
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; CHECKT2D: mov r0, [[SAVEX]]
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%call = tail call i16 @retzext16(i16 %x)
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%b = zext i16 %call to i32
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%call2 = tail call i32 @identity32(i32 %b)
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ret i16 %x
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}
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define i16 @test_mismatched_ret(i16 %x) {
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entry:
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; CHECKELF-LABEL: test_mismatched_ret:
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; CHECKELF: mov [[SAVEX:r[0-9]+]], r0
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; CHECKELF: bl retzext16
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; CHECKELF: sxth r0, {{r[0-9]+}}
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; CHECKELF: bl identity32
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; CHECKELF: mov r0, [[SAVEX]]
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; CHECKT2D-LABEL: test_mismatched_ret:
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; CHECKT2D: mov [[SAVEX:r[0-9]+]], r0
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; CHECKT2D: blx _retzext16
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; CHECKT2D: sxth r0, {{r[0-9]+}}
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; CHECKT2D: blx _identity32
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; CHECKT2D: mov r0, [[SAVEX]]
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%call = tail call i16 @retzext16(i16 %x)
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%b = sext i16 %call to i32
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%call2 = tail call i32 @identity32(i32 %b)
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ret i16 %x
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}
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define i16 @test_matched_paramext(i16 %x) {
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entry:
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; CHECKELF-LABEL: test_matched_paramext:
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; CHECKELF: uxth r0, r0
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; CHECKELF: bl paramzext16
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; CHECKELF: uxth r0, r0
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; CHECKELF: bl identity32
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; CHECKELF: b paramzext16
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; CHECKT2D-LABEL: test_matched_paramext:
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; CHECKT2D: uxth r0, r0
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; CHECKT2D: blx _paramzext16
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; CHECKT2D: uxth r0, r0
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; CHECKT2D: blx _identity32
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; CHECKT2D: b.w _paramzext16
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%call = tail call i16 @paramzext16(i16 %x)
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%b = zext i16 %call to i32
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%call2 = tail call i32 @identity32(i32 %b)
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%call3 = tail call i16 @paramzext16(i16 %call)
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ret i16 %call3
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}
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; FIXME: This theoretically ought to optimize to exact same output as the
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; version above, but doesn't currently (see SelectionDAGBuilder.cpp)
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define i16 @test_matched_paramext2(i16 %x) {
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entry:
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; Since there doesn't seem to be an unambiguous optimal selection and
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; scheduling of uxth and mov instructions below in lieu of the 'returned'
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; optimization, don't bother checking: just verify that the calls are made
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; in the correct order as a basic sanity check
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; CHECKELF-LABEL: test_matched_paramext2:
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; CHECKELF: bl paramzext16
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; CHECKELF: bl identity32
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; CHECKELF: b paramzext16
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; CHECKT2D-LABEL: test_matched_paramext2:
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; CHECKT2D: blx _paramzext16
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; CHECKT2D: blx _identity32
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; CHECKT2D: b.w _paramzext16
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%call = tail call i16 @paramzext16(i16 %x)
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; Should make no difference if %x is used below rather than %call, but it does
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%b = zext i16 %x to i32
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%call2 = tail call i32 @identity32(i32 %b)
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%call3 = tail call i16 @paramzext16(i16 %call)
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ret i16 %call3
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}
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define i16 @test_matched_bothext(i16 %x) {
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entry:
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; CHECKELF-LABEL: test_matched_bothext:
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; CHECKELF: uxth r0, r0
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; CHECKELF: bl bothzext16
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; CHECKELF-NOT: uxth r0, r0
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; FIXME: Tail call should be OK here
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; CHECKELF: bl identity32
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; CHECKT2D-LABEL: test_matched_bothext:
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; CHECKT2D: uxth r0, r0
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; CHECKT2D: blx _bothzext16
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; CHECKT2D-NOT: uxth r0, r0
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; FIXME: Tail call should be OK here
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; CHECKT2D: blx _identity32
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%call = tail call i16 @bothzext16(i16 %x)
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%b = zext i16 %x to i32
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%call2 = tail call i32 @identity32(i32 %b)
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ret i16 %call
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}
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define i16 @test_mismatched_bothext(i16 %x) {
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entry:
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; CHECKELF-LABEL: test_mismatched_bothext:
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; CHECKELF: mov [[SAVEX:r[0-9]+]], r0
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; CHECKELF: uxth r0, {{r[0-9]+}}
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; CHECKELF: bl bothzext16
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; CHECKELF: sxth r0, [[SAVEX]]
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; CHECKELF: bl identity32
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; CHECKELF: mov r0, [[SAVEX]]
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; CHECKT2D-LABEL: test_mismatched_bothext:
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; CHECKT2D: mov [[SAVEX:r[0-9]+]], r0
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; CHECKT2D: uxth r0, {{r[0-9]+}}
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; CHECKT2D: blx _bothzext16
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; CHECKT2D: sxth r0, [[SAVEX]]
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; CHECKT2D: blx _identity32
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; CHECKT2D: mov r0, [[SAVEX]]
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%call = tail call i16 @bothzext16(i16 %x)
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%b = sext i16 %x to i32
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%call2 = tail call i32 @identity32(i32 %b)
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ret i16 %x
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}
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